485BPOS

As filed with the Securities and Exchange Commission on February 13, 2013

1933 Act File No. 033-00572

1940 Act File No. 811-04409

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM N-1A
	REGISTRATION STATEMENT UNDER THE SECURITIES ACT of 1933	o
	POST-EFFECTIVE AMENDMENT NO. 144	x
	REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	o
	AMENDMENT NO. 146	x
Eaton Vance Municipals Trust
(Exact Name of Registrant as Specified in Charter)
Two International Place, Boston, Massachusetts 02110
(Address of Principal Executive Offices)
(617) 482-8260
(Registrant’s Telephone Number)
MAUREEN A. GEMMA
Two International Place, Boston, Massachusetts 02110
(Name and Address of Agent for Service)

 

It is proposed that this filing will become effective pursuant to Rule 485 (check appropriate box):
x	immediately upon filing pursuant to paragraph (b)	o	on (date) pursuant to paragraph (a)(1)
o	on (date) pursuant to paragraph (b)	o	75 days after filing pursuant to paragraph (a)(2)
o	60 days after filing pursuant to paragraph (a)(1)	o	on (date) pursuant to paragraph (a)(2)
If appropriate, check the following box:
o	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to the Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized in the City of Boston, and the Commonwealth of Massachusetts, on February 13,2013.

Eaton Vance Municipals Trust

By:  /s/ Thomas M. Metzold

Thomas M. Metzold, President

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities indicated on February 13,2013.

Signature			Title
/s/ Thomas M. Metzold			President (Chief Executive Officer)
Thomas M. Metzold
/s/ Barbara E. Campbell			Treasurer (Principal Financial and Accounting Officer)
Barbara E. Campbell
Signature		Title		Signature	Title
Scott E. Eston*		Trustee		Ronald A. Pearlman*	Trustee
Scott E. Eston				Ronald A. Pearlman
Benjamin C. Esty*		Trustee		Helen Frame Peters*	Trustee
Benjamin C. Esty				Helen Frame Peters
Thomas E. Faust Jr.*		Trustee		Lynn A. Stout*	Trustee
Thomas E. Faust Jr.				Lynn A. Stout
Allen R. Freedman*		Trustee		Harriett Tee Taggart*	Trustee
Allen R. Freedman				Harriett Tee Taggart
William H. Park*		Trustee		Ralph F. Verni*	Trustee
William H. Park				Ralph F. Verni
*By:	/s/ Maureen A. Gemma
	Maureen A. Gemma (As attorney-in-fact)

* Pursuant to a Power of Attorney dated December 17, 2012 filed as Exhibit (q) to the Registrant’s Post-Effective Amendment No. 141 filed December 20, 2012 (Accession No. 0000940394-12-001270) and incorporated herein by reference.

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
Ex-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Eaton Vance Massachusetts Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Massachusetts state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance Massachusetts Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance Massachusetts Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.39%	0.39%	0.39%
Distribution and Service (12b-1) Fees	0.20%	0.95%	none
Interest Expense	0.08%	0.08%	0.08%
Expenses other than Interest Expense	0.15%	0.15%	0.15%
Other Expenses	0.23%	0.23%	0.23%
Total Annual Fund Operating Expenses	0.82%	1.57%	0.62%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance Massachusetts Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	555	724	908	1,440
Class C	260	496	855	1,867
Class I	63	199	346	774

Expense Example, No Redemption Eaton Vance Massachusetts Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	555	724	908	1,440
Class C	160	496	855	1,867
Class I	63	199	346	774

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 22 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.48% for the quarter ended September 30, 2009, and the lowest quarterly return was –11.18% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.45%) for Class A shares were 2.28 % and 3.70 %, respectively, for Class C shares were 1.66 % and 2.70 %, respectively, and for Class I shares were 2.60 % and 4.22 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance Massachusetts Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.29%	4.05%	3.90%
Class A After Taxes on Distributions	5.26%	4.05%	3.90%
Class A After Taxes on Distributions and Sales	4.76%	4.07%	3.96%
Class C	8.72%	4.28%	3.65%
Class I	10.77%	5.26%	4.64%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes).  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

XML

Eaton Vance California Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and California state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance California Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance California Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.44%	0.44%	0.44%
Distribution and Service (12b-1) Fees	0.25%	1.00%	none
Interest Expense	0.06%	0.06%	0.06%
Expenses other than Interest Expense	0.15%	0.15%	0.15%
Other Expenses	0.21%	0.21%	0.21%
Total Annual Fund Operating Expenses	0.90%	1.65%	0.65%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance California Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	562	748	950	1,530
Class C	268	520	897	1,955
Class I	66	208	362	810

Expense Example, No Redemption Eaton Vance California Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	562	748	950	1,530
Class C	168	520	897	1,955
Class I	66	208	362	810

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 23 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.25% for the quarter ended September 30, 2009, and the lowest quarterly return was –10.81% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 41.70%) for Class A shares were 2.27 % and 3.89 %, respectively, for Class C shares were 1.64 % and 2.81 %, respectively, and for Class I shares were 2.63 % and 4.51 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance California Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.78%	3.56%	3.78%
Class A After Taxes on Distributions	5.78%	3.55%	3.74%
Class A After Taxes on Distributions and Sales	5.07%	3.63%	3.84%
Class C	9.18%	3.81%	3.61%
Class I	11.26%	4.84%	4.42%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to August 31, 2004 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Eaton Vance Massachusetts Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Massachusetts state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance Massachusetts Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance Massachusetts Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.39%	0.39%	0.39%
Distribution and Service (12b-1) Fees	0.20%	0.95%	none
Interest Expense	0.08%	0.08%	0.08%
Expenses other than Interest Expense	0.15%	0.15%	0.15%
Other Expenses	0.23%	0.23%	0.23%
Total Annual Fund Operating Expenses	0.82%	1.57%	0.62%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance Massachusetts Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	555	724	908	1,440
Class C	260	496	855	1,867
Class I	63	199	346	774

Expense Example, No Redemption Eaton Vance Massachusetts Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	555	724	908	1,440
Class C	160	496	855	1,867
Class I	63	199	346	774

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 22 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.48% for the quarter ended September 30, 2009, and the lowest quarterly return was –11.18% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.45%) for Class A shares were 2.28 % and 3.70 %, respectively, for Class C shares were 1.66 % and 2.70 %, respectively, and for Class I shares were 2.60 % and 4.22 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance Massachusetts Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.29%	4.05%	3.90%
Class A After Taxes on Distributions	5.26%	4.05%	3.90%
Class A After Taxes on Distributions and Sales	4.76%	4.07%	3.96%
Class C	8.72%	4.28%	3.65%
Class I	10.77%	5.26%	4.64%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes).  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Eaton Vance National Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance National Municipal Income Fund	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	5.00%	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance National Municipal Income Fund	Class A	Class B	Class C	Class I
Management Fees	0.34%	0.34%	0.34%	0.34%
Distribution and Service (12b-1) Fees	0.25%	1.00%	1.00%	none
Interest Expense	0.11%	0.11%	0.11%	0.11%
Expenses other than Interest Expense	0.08%	0.08%	0.08%	0.08%
Other Expenses	0.19%	0.19%	0.19%	0.19%
Total Annual Fund Operating Expenses	0.78%	1.53%	1.53%	0.53%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance National Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	551	712	888	1,395
Class B	656	883	1,034	1,621
Class C	256	483	834	1,824
Class I	54	170	296	665

Expense Example, No Redemption Eaton Vance National Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	551	712	888	1,395
Class B	156	483	834	1,621
Class C	156	483	834	1,824
Class I	54	170	296	665

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 59 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations, the interest on which is exempt from regular federal income tax which, in accordance with the Fund’s investment objective, the Fund seeks to avoid (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 65% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”).  The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to alternative minimum tax.  The Fund may not be suitable for investors subject to the alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund may concentrate its investments in certain types of municipal obligations and in certain sectors, the value of Fund shares may be affected by events that adversely affect that sector or type of obligation and may fluctuate more than that of a less concentrated fund. General obligation bonds issued by municipalities are adversely affected by economic downturns and the resulting decline in tax revenues.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  If the sales charge was reflected, the returns would be lower.  Returns in the table for Class A shares are shown before and after the reduction of taxes.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 16. 49 % for the quarter ended September 30, 2009, and the lowest quarterly return was –18. 78 % for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a federal income tax rate of 35.00%) for Class A shares were 3.37 % and 5.18 %, respectively, for Class B and Class C shares were 2.80 % and 4.31 %, respectively, and for Class I shares were 3.79 % and 5.83 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance National Municipal Income Fund	1 Year	5 Years	10 Years
Class A	8.78%	2.98%	4.50%
Class A After Taxes on Distributions	8.70%	2.96%	4.49%
Class A After Taxes on Distributions and Sales	7.33%	3.21%	4.57%
Class B	8.37%	2.87%	4.30%
Class C	12.37%	3.20%	4.23%
Class I	14.50%	4.22%	5.27%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital Long (22+) Municipal Bond Index	11.26%	6.35%	5.83%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Eaton Vance New York Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and New York state and New York City personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance New York Municipal Income Fund	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	5.00%	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance New York Municipal Income Fund	Class A	Class B	Class C	Class I
Management Fees	0.42%	0.42%	0.42%	0.42%
Distribution and Service (12b-1) Fees	0.20%	0.95%	0.95%	none
Interest Expense	0.08%	0.08%	0.08%	0.08%
Expenses other than Interest Expense	0.14%	0.14%	0.13%	0.13%
Other Expenses	0.22%	0.22%	0.21%	0.21%
Total Annual Fund Operating Expenses	0.84%	1.59%	1.58%	0.63%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance New York Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	557	730	919	1,463
Class B	662	902	1,066	1,688
Class C	261	499	860	1,878
Class I	64	202	351	786

Expense Example, No Redemption Eaton Vance New York Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	557	730	919	1,463
Class B	162	502	866	1,688
Class C	161	499	860	1,878
Class I	64	202	351	786

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 13 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 11. 96 % for the quarter ended September 30, 2009, and the lowest quarterly return was –14. 68 % for the quarter ended December 31,2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 40. 73 %) for Class A shares were 2.43 % and 4.10 %, respectively, for Class B and Class C shares were 1.82 % and 3.07 %, respectively, and for Class I shares were 2.76 % and 4.66 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance New York Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.45%	4.05%	4.03%
Class A After Taxes on Distributions	5.46%	4.04%	3.99%
Class A After Taxes on Distributions and Sales	4.99%	4.08%	4.07%
Class B	4.95%	3.96%	3.86%
Class C	8.96%	4.31%	3.62%
Class I	11.01%	5.26%	4.63%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  The Class C performance shown above for the period prior to September 30, 2003 (commencement of operations) is the performance of Class B shares, which has since converted into another share class, adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Eaton Vance Ohio Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Ohio state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance Ohio Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance Ohio Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.40%	0.40%	0.40%
Distribution and Service (12b-1) Fees	0.20%	0.95%	none
Interest Expense	0.03%	0.03%	0.03%
Expenses other than Interest Expense	0.13%	0.13%	0.13%
Other Expenses	0.16%	0.16%	0.16%
Total Annual Fund Operating Expenses	0.76%	1.51%	0.56%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance Ohio Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	549	706	877	1,372
Class C	254	477	824	1,802
Class I	57	179	313	701

Expense Example, No Redemption Eaton Vance Ohio Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	549	706	877	1,372
Class C	154	477	824	1,802
Class I	57	179	313	701

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective .  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund ..  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was  10.91% for the quarter ended September 30, 2009, and the lowest quarterly return was -7.44% for the quarter ended December 31, 2010.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.85%) for Class A shares were 2.39 % and 3.91 %, respectively, for Class C shares were 1.75 % and 2.86 %, respectively, and for Class I shares were 2.70 % and 4.42 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance Ohio Municipal Income Fund	1 Year	5 Years	10 Years
Class A	4.76%	3.93%	4.47%
Class A After Taxes on Distributions	4.75%	3.93%	4.46%
Class A After Taxes on Distributions and Sales	4.45%	3.94%	4.46%
Class C	8.23%	4.17%	4.22%
Class I	10.27%	5.07%	5.04%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to February 3, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

XML

Eaton Vance National Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance National Municipal Income Fund	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	5.00%	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance National Municipal Income Fund	Class A	Class B	Class C	Class I
Management Fees	0.34%	0.34%	0.34%	0.34%
Distribution and Service (12b-1) Fees	0.25%	1.00%	1.00%	none
Interest Expense	0.11%	0.11%	0.11%	0.11%
Expenses other than Interest Expense	0.08%	0.08%	0.08%	0.08%
Other Expenses	0.19%	0.19%	0.19%	0.19%
Total Annual Fund Operating Expenses	0.78%	1.53%	1.53%	0.53%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance National Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	551	712	888	1,395
Class B	656	883	1,034	1,621
Class C	256	483	834	1,824
Class I	54	170	296	665

Expense Example, No Redemption Eaton Vance National Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	551	712	888	1,395
Class B	156	483	834	1,621
Class C	156	483	834	1,824
Class I	54	170	296	665

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 59 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations, the interest on which is exempt from regular federal income tax which, in accordance with the Fund’s investment objective, the Fund seeks to avoid (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 65% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”).  The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to alternative minimum tax.  The Fund may not be suitable for investors subject to the alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund may concentrate its investments in certain types of municipal obligations and in certain sectors, the value of Fund shares may be affected by events that adversely affect that sector or type of obligation and may fluctuate more than that of a less concentrated fund. General obligation bonds issued by municipalities are adversely affected by economic downturns and the resulting decline in tax revenues.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  If the sales charge was reflected, the returns would be lower.  Returns in the table for Class A shares are shown before and after the reduction of taxes.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 16. 49 % for the quarter ended September 30, 2009, and the lowest quarterly return was –18. 78 % for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a federal income tax rate of 35.00%) for Class A shares were 3.37 % and 5.18 %, respectively, for Class B and Class C shares were 2.80 % and 4.31 %, respectively, and for Class I shares were 3.79 % and 5.83 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance National Municipal Income Fund	1 Year	5 Years	10 Years
Class A	8.78%	2.98%	4.50%
Class A After Taxes on Distributions	8.70%	2.96%	4.49%
Class A After Taxes on Distributions and Sales	7.33%	3.21%	4.57%
Class B	8.37%	2.87%	4.30%
Class C	12.37%	3.20%	4.23%
Class I	14.50%	4.22%	5.27%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital Long (22+) Municipal Bond Index	11.26%	6.35%	5.83%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

XML

Eaton Vance California Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and California state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance California Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance California Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.44%	0.44%	0.44%
Distribution and Service (12b-1) Fees	0.25%	1.00%	none
Interest Expense	0.06%	0.06%	0.06%
Expenses other than Interest Expense	0.15%	0.15%	0.15%
Other Expenses	0.21%	0.21%	0.21%
Total Annual Fund Operating Expenses	0.90%	1.65%	0.65%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance California Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	562	748	950	1,530
Class C	268	520	897	1,955
Class I	66	208	362	810

Expense Example, No Redemption Eaton Vance California Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	562	748	950	1,530
Class C	168	520	897	1,955
Class I	66	208	362	810

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 23 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.25% for the quarter ended September 30, 2009, and the lowest quarterly return was –10.81% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 41.70%) for Class A shares were 2.27 % and 3.89 %, respectively, for Class C shares were 1.64 % and 2.81 %, respectively, and for Class I shares were 2.63 % and 4.51 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance California Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.78%	3.56%	3.78%
Class A After Taxes on Distributions	5.78%	3.55%	3.74%
Class A After Taxes on Distributions and Sales	5.07%	3.63%	3.84%
Class C	9.18%	3.81%	3.61%
Class I	11.26%	4.84%	4.42%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to August 31, 2004 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

XML

Eaton Vance New York Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and New York state and New York City personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance New York Municipal Income Fund	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	5.00%	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance New York Municipal Income Fund	Class A	Class B	Class C	Class I
Management Fees	0.42%	0.42%	0.42%	0.42%
Distribution and Service (12b-1) Fees	0.20%	0.95%	0.95%	none
Interest Expense	0.08%	0.08%	0.08%	0.08%
Expenses other than Interest Expense	0.14%	0.14%	0.13%	0.13%
Other Expenses	0.22%	0.22%	0.21%	0.21%
Total Annual Fund Operating Expenses	0.84%	1.59%	1.58%	0.63%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance New York Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	557	730	919	1,463
Class B	662	902	1,066	1,688
Class C	261	499	860	1,878
Class I	64	202	351	786

Expense Example, No Redemption Eaton Vance New York Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	557	730	919	1,463
Class B	162	502	866	1,688
Class C	161	499	860	1,878
Class I	64	202	351	786

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 13 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 11. 96 % for the quarter ended September 30, 2009, and the lowest quarterly return was –14. 68 % for the quarter ended December 31,2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 40. 73 %) for Class A shares were 2.43 % and 4.10 %, respectively, for Class B and Class C shares were 1.82 % and 3.07 %, respectively, and for Class I shares were 2.76 % and 4.66 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance New York Municipal Income Fund	1 Year	5 Years	10 Years
Class A	5.45%	4.05%	4.03%
Class A After Taxes on Distributions	5.46%	4.04%	3.99%
Class A After Taxes on Distributions and Sales	4.99%	4.08%	4.07%
Class B	4.95%	3.96%	3.86%
Class C	8.96%	4.31%	3.62%
Class I	11.01%	5.26%	4.63%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  The Class C performance shown above for the period prior to September 30, 2003 (commencement of operations) is the performance of Class B shares, which has since converted into another share class, adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

XML

Label

Element

Value

[RiskReturnAbstract]

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Sep. 30, 2012

Registrant Name

dei_EntityRegistrantName

Eaton Vance Municipals Trust

Central Index Key

dei_EntityCentralIndexKey

0000778365

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Jan. 28, 2013

Document Effective Date

dei_DocumentEffectiveDate

Feb. 01, 2013

Prospectus Date

rr_ProspectusDate

Feb. 01, 2013

Eaton Vance California Municipal Income Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide current income exempt from regular federal income tax and California state personal income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 23 % of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.  

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Risk Lose Money [Text]

rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.25% for the quarter ended September 30, 2009, and the lowest quarterly return was –10.81% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 41.70%) for Class A shares were 2.27 % and 3.89 %, respectively, for Class C shares were 1.64 % and 2.81 %, respectively, and for Class I shares were 2.63 % and 4.51 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.25%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.81%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions, and may differ from those shown.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to August 31, 2004 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Thirty Day Yield Phone

rr_ThirtyDayYieldPhone

For current yield information call 1-800-262-1122.

Eaton Vance California Municipal Income Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EACAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.44%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.06%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.90%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

562

3 Years

rr_ExpenseExampleYear03

748

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

950

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,530

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

562

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

748

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

950

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,530

Annual Return 2003

rr_AnnualReturn2003

5.25%

Annual Return 2004

rr_AnnualReturn2004

3.76%

Annual Return 2005

rr_AnnualReturn2005

5.00%

Annual Return 2006

rr_AnnualReturn2006

6.46%

Annual Return 2007

rr_AnnualReturn2007

(0.29%)

Annual Return 2008

rr_AnnualReturn2008

(18.73%)

Annual Return 2009

rr_AnnualReturn2009

24.79%

Annual Return 2010

rr_AnnualReturn2010

(1.14%)

Annual Return 2011

rr_AnnualReturn2011

12.40%

Annual Return 2012

rr_AnnualReturn2012

11.00%

1 Year

rr_AverageAnnualReturnYear01

5.78%

5 Years

rr_AverageAnnualReturnYear05

3.56%

10 Years

rr_AverageAnnualReturnYear10

3.78%

Thirty Day Yield

rr_ThirtyDayYield

2.27%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

3.89%

Eaton Vance California Municipal Income Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECCAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.44%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.06%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.65%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

268

3 Years

rr_ExpenseExampleYear03

520

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

897

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,955

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

168

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

520

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

897

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,955

1 Year

rr_AverageAnnualReturnYear01

9.18%

5 Years

rr_AverageAnnualReturnYear05

3.81%

10 Years

rr_AverageAnnualReturnYear10

3.61%

Thirty Day Yield

rr_ThirtyDayYield

1.64%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

2.81%

Eaton Vance California Municipal Income Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EICAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.44%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Interest Expense

rr_Component1OtherExpensesOverAssets

0.06%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.65%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

66

3 Years

rr_ExpenseExampleYear03

208

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

362

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

810

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

66

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

208

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

362

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

810

1 Year

rr_AverageAnnualReturnYear01

11.26%

5 Years

rr_AverageAnnualReturnYear05

4.84%

10 Years

rr_AverageAnnualReturnYear10

4.42%

Thirty Day Yield

rr_ThirtyDayYield

2.63%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.51%

Eaton Vance California Municipal Income Fund | After Taxes on Distributions | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.78%

5 Years

rr_AverageAnnualReturnYear05

3.55%

10 Years

rr_AverageAnnualReturnYear10

3.74%

Eaton Vance California Municipal Income Fund | After Taxes on Distributions and Sales | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.07%

5 Years

rr_AverageAnnualReturnYear05

3.63%

10 Years

rr_AverageAnnualReturnYear10

3.84%

Eaton Vance California Municipal Income Fund | Barclays Capital Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.78%

5 Years

rr_AverageAnnualReturnYear05

5.90%

10 Years

rr_AverageAnnualReturnYear10

5.10%

Eaton Vance California Municipal Income Fund | Barclays Capital 20 Year Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.01%

5 Years

rr_AverageAnnualReturnYear05

6.81%

10 Years

rr_AverageAnnualReturnYear10

6.01%

Eaton Vance Massachusetts Municipal Income Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Massachusetts state personal income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 22 % of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

22.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.  

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Risk Lose Money [Text]

rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 12.48% for the quarter ended September 30, 2009, and the lowest quarterly return was –11.18% for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.45%) for Class A shares were 2.28 % and 3.70 %, respectively, for Class C shares were 1.66 % and 2.70 %, respectively, and for Class I shares were 2.60 % and 4.22 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.48%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(11.18%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions, and may differ from those shown.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes).  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Thirty Day Yield Phone

rr_ThirtyDayYieldPhone

For current yield information call 1-800-262-1122.

Eaton Vance Massachusetts Municipal Income Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ETMAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.39%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.20%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.82%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

555

3 Years

rr_ExpenseExampleYear03

724

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

908

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,440

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

555

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

724

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

908

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,440

Annual Return 2003

rr_AnnualReturn2003

5.75%

Annual Return 2004

rr_AnnualReturn2004

4.07%

Annual Return 2005

rr_AnnualReturn2005

4.33%

Annual Return 2006

rr_AnnualReturn2006

7.67%

Annual Return 2007

rr_AnnualReturn2007

(2.76%)

Annual Return 2008

rr_AnnualReturn2008

(19.95%)

Annual Return 2009

rr_AnnualReturn2009

27.14%

Annual Return 2010

rr_AnnualReturn2010

0.14%

Annual Return 2011

rr_AnnualReturn2011

13.68%

Annual Return 2012

rr_AnnualReturn2012

10.54%

1 Year

rr_AverageAnnualReturnYear01

5.29%

5 Years

rr_AverageAnnualReturnYear05

4.05%

10 Years

rr_AverageAnnualReturnYear10

3.90%

Thirty Day Yield

rr_ThirtyDayYield

2.28%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

3.70%

Eaton Vance Massachusetts Municipal Income Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECMMX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.39%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.95%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.57%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

260

3 Years

rr_ExpenseExampleYear03

496

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

855

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,867

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

160

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

496

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

855

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,867

1 Year

rr_AverageAnnualReturnYear01

8.72%

5 Years

rr_AverageAnnualReturnYear05

4.28%

10 Years

rr_AverageAnnualReturnYear10

3.65%

Thirty Day Yield

rr_ThirtyDayYield

1.66%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

2.70%

Eaton Vance Massachusetts Municipal Income Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIMAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.39%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.62%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

63

3 Years

rr_ExpenseExampleYear03

199

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

346

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

774

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

63

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

199

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

346

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

774

1 Year

rr_AverageAnnualReturnYear01

10.77%

5 Years

rr_AverageAnnualReturnYear05

5.26%

10 Years

rr_AverageAnnualReturnYear10

4.64%

Thirty Day Yield

rr_ThirtyDayYield

2.60%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.22%

Eaton Vance Massachusetts Municipal Income Fund | After Taxes on Distributions | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.26%

5 Years

rr_AverageAnnualReturnYear05

4.05%

10 Years

rr_AverageAnnualReturnYear10

3.90%

Eaton Vance Massachusetts Municipal Income Fund | After Taxes on Distributions and Sales | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.76%

5 Years

rr_AverageAnnualReturnYear05

4.07%

10 Years

rr_AverageAnnualReturnYear10

3.96%

Eaton Vance Massachusetts Municipal Income Fund | Barclays Capital Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.78%

5 Years

rr_AverageAnnualReturnYear05

5.90%

10 Years

rr_AverageAnnualReturnYear10

5.10%

Eaton Vance Massachusetts Municipal Income Fund | Barclays Capital 20 Year Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.01%

5 Years

rr_AverageAnnualReturnYear05

6.81%

10 Years

rr_AverageAnnualReturnYear10

6.01%

Eaton Vance National Municipal Income Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide current income exempt from regular federal income tax.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 59 % of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

59.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.  

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations, the interest on which is exempt from regular federal income tax which, in accordance with the Fund’s investment objective, the Fund seeks to avoid (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 65% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”).  The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to alternative minimum tax.  The Fund may not be suitable for investors subject to the alternative minimum tax.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations, the interest on which is exempt from regular federal income tax which, in accordance with the Fund’s investment objective, the Fund seeks to avoid (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 65% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”).  The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund may concentrate its investments in certain types of municipal obligations and in certain sectors, the value of Fund shares may be affected by events that adversely affect that sector or type of obligation and may fluctuate more than that of a less concentrated fund. General obligation bonds issued by municipalities are adversely affected by economic downturns and the resulting decline in tax revenues.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Risk Lose Money [Text]

rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  If the sales charge was reflected, the returns would be lower.  Returns in the table for Class A shares are shown before and after the reduction of taxes.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

 If the sales charge was reflected, the returns would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 16. 49 % for the quarter ended September 30, 2009, and the lowest quarterly return was –18. 78 % for the quarter ended December 31, 2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a federal income tax rate of 35.00%) for Class A shares were 3.37 % and 5.18 %, respectively, for Class B and Class C shares were 2.80 % and 4.31 %, respectively, and for Class I shares were 3.79 % and 5.83 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.49%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(18.78%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions, and may differ from those shown.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Thirty Day Yield Phone

rr_ThirtyDayYieldPhone

For current yield information call 1-800-262-1122.

Eaton Vance National Municipal Income Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EANAX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.34%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.11%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.08%

Other Expenses

rr_OtherExpensesOverAssets

0.19%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.78%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

551

3 Years

rr_ExpenseExampleYear03

712

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

888

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,395

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

551

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

712

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

888

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,395

Annual Return 2003

rr_AnnualReturn2003

9.09%

Annual Return 2004

rr_AnnualReturn2004

6.56%

Annual Return 2005

rr_AnnualReturn2005

7.75%

Annual Return 2006

rr_AnnualReturn2006

10.17%

Annual Return 2007

rr_AnnualReturn2007

(2.77%)

Annual Return 2008

rr_AnnualReturn2008

(31.06%)

Annual Return 2009

rr_AnnualReturn2009

39.78%

Annual Return 2010

rr_AnnualReturn2010

(1.14%)

Annual Return 2011

rr_AnnualReturn2011

11.72%

Annual Return 2012

rr_AnnualReturn2012

14.22%

1 Year

rr_AverageAnnualReturnYear01

8.78%

5 Years

rr_AverageAnnualReturnYear05

2.98%

10 Years

rr_AverageAnnualReturnYear10

4.50%

Thirty Day Yield

rr_ThirtyDayYield

3.37%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

5.18%

Eaton Vance National Municipal Income Fund | Class B

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EVHMX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

5.00%

Management Fees

rr_ManagementFeesOverAssets

0.34%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.11%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.08%

Other Expenses

rr_OtherExpensesOverAssets

0.19%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.53%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

656

3 Years

rr_ExpenseExampleYear03

883

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,034

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,621

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

156

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

483

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

834

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,621

1 Year

rr_AverageAnnualReturnYear01

8.37%

5 Years

rr_AverageAnnualReturnYear05

2.87%

10 Years

rr_AverageAnnualReturnYear10

4.30%

Thirty Day Yield

rr_ThirtyDayYield

2.80%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.31%

Eaton Vance National Municipal Income Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECHMX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.34%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.11%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.08%

Other Expenses

rr_OtherExpensesOverAssets

0.19%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.53%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

256

3 Years

rr_ExpenseExampleYear03

483

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

834

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,824

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

156

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

483

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

834

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,824

1 Year

rr_AverageAnnualReturnYear01

12.37%

5 Years

rr_AverageAnnualReturnYear05

3.20%

10 Years

rr_AverageAnnualReturnYear10

4.23%

Thirty Day Yield

rr_ThirtyDayYield

2.80%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.31%

Eaton Vance National Municipal Income Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIHMX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.34%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Interest Expense

rr_Component1OtherExpensesOverAssets

0.11%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.08%

Other Expenses

rr_OtherExpensesOverAssets

0.19%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.53%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

54

3 Years

rr_ExpenseExampleYear03

170

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

296

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

665

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

54

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

170

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

296

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

665

1 Year

rr_AverageAnnualReturnYear01

14.50%

5 Years

rr_AverageAnnualReturnYear05

4.22%

10 Years

rr_AverageAnnualReturnYear10

5.27%

Thirty Day Yield

rr_ThirtyDayYield

3.79%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

5.83%

Eaton Vance National Municipal Income Fund | After Taxes on Distributions | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.70%

5 Years

rr_AverageAnnualReturnYear05

2.96%

10 Years

rr_AverageAnnualReturnYear10

4.49%

Eaton Vance National Municipal Income Fund | After Taxes on Distributions and Sales | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.33%

5 Years

rr_AverageAnnualReturnYear05

3.21%

10 Years

rr_AverageAnnualReturnYear10

4.57%

Eaton Vance National Municipal Income Fund | Barclays Capital Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.78%

5 Years

rr_AverageAnnualReturnYear05

5.90%

10 Years

rr_AverageAnnualReturnYear10

5.10%

Eaton Vance National Municipal Income Fund | Barclays Capital Long (22+) Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.26%

5 Years

rr_AverageAnnualReturnYear05

6.35%

10 Years

rr_AverageAnnualReturnYear10

5.83%

Eaton Vance New York Municipal Income Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide current income exempt from regular federal income tax and New York state and New York City personal income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 13 % of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

13.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.  

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective.   In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.   Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Risk Lose Money [Text]

rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was 11. 96 % for the quarter ended September 30, 2009, and the lowest quarterly return was –14. 68 % for the quarter ended December 31,2008.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 40. 73 %) for Class A shares were 2.43 % and 4.10 %, respectively, for Class B and Class C shares were 1.82 % and 3.07 %, respectively, and for Class I shares were 2.76 % and 4.66 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

11.96%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(14.68%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions, and may differ from those shown.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C.  The Class C performance shown above for the period prior to September 30, 2003 (commencement of operations) is the performance of Class B shares, which has since converted into another share class, adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Thirty Day Yield Phone

rr_ThirtyDayYieldPhone

For current yield information call 1-800-262-1122.

Eaton Vance New York Municipal Income Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ETNYX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.42%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.20%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.14%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.84%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

557

3 Years

rr_ExpenseExampleYear03

730

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

919

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,463

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

557

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

730

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

919

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,463

Annual Return 2003

rr_AnnualReturn2003

6.79%

Annual Return 2004

rr_AnnualReturn2004

3.70%

Annual Return 2005

rr_AnnualReturn2005

3.60%

Annual Return 2006

rr_AnnualReturn2006

7.13%

Annual Return 2007

rr_AnnualReturn2007

(1.00%)

Annual Return 2008

rr_AnnualReturn2008

(23.32%)

Annual Return 2009

rr_AnnualReturn2009

33.54%

Annual Return 2010

rr_AnnualReturn2010

0.26%

Annual Return 2011

rr_AnnualReturn2011

12.73%

Annual Return 2012

rr_AnnualReturn2012

10.67%

1 Year

rr_AverageAnnualReturnYear01

5.45%

5 Years

rr_AverageAnnualReturnYear05

4.05%

10 Years

rr_AverageAnnualReturnYear10

4.03%

Thirty Day Yield

rr_ThirtyDayYield

2.43%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.10%

Eaton Vance New York Municipal Income Fund | Class B

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EVNYX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

5.00%

Management Fees

rr_ManagementFeesOverAssets

0.42%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.95%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.14%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.59%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

662

3 Years

rr_ExpenseExampleYear03

902

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,066

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,688

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

162

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

502

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

866

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,688

1 Year

rr_AverageAnnualReturnYear01

4.95%

5 Years

rr_AverageAnnualReturnYear05

3.96%

10 Years

rr_AverageAnnualReturnYear10

3.86%

Thirty Day Yield

rr_ThirtyDayYield

1.82%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

3.07%

Eaton Vance New York Municipal Income Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECNYX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.42%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.95%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.13%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.58%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

261

3 Years

rr_ExpenseExampleYear03

499

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

860

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,878

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

161

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

499

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

860

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,878

1 Year

rr_AverageAnnualReturnYear01

8.96%

5 Years

rr_AverageAnnualReturnYear05

4.31%

10 Years

rr_AverageAnnualReturnYear10

3.62%

Thirty Day Yield

rr_ThirtyDayYield

1.82%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

3.07%

Eaton Vance New York Municipal Income Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EINYX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.42%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Interest Expense

rr_Component1OtherExpensesOverAssets

0.08%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.13%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.63%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

64

3 Years

rr_ExpenseExampleYear03

202

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

351

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

786

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

64

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

202

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

351

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

786

1 Year

rr_AverageAnnualReturnYear01

11.01%

5 Years

rr_AverageAnnualReturnYear05

5.26%

10 Years

rr_AverageAnnualReturnYear10

4.63%

Thirty Day Yield

rr_ThirtyDayYield

2.76%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.66%

Eaton Vance New York Municipal Income Fund | After Taxes on Distributions | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.46%

5 Years

rr_AverageAnnualReturnYear05

4.04%

10 Years

rr_AverageAnnualReturnYear10

3.99%

Eaton Vance New York Municipal Income Fund | After Taxes on Distributions and Sales | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.99%

5 Years

rr_AverageAnnualReturnYear05

4.08%

10 Years

rr_AverageAnnualReturnYear10

4.07%

Eaton Vance New York Municipal Income Fund | Barclays Capital Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.78%

5 Years

rr_AverageAnnualReturnYear05

5.90%

10 Years

rr_AverageAnnualReturnYear10

5.10%

Eaton Vance New York Municipal Income Fund | Barclays Capital 20 Year Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.01%

5 Years

rr_AverageAnnualReturnYear05

6.81%

10 Years

rr_AverageAnnualReturnYear10

6.01%

Eaton Vance Ohio Municipal Income Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Ohio state personal income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9 % of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

9.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.  

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.  

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective .  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund ..  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Risk Lose Money [Text]

rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was  10.91% for the quarter ended September 30, 2009, and the lowest quarterly return was -7.44% for the quarter ended December 31, 2010.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.85%) for Class A shares were 2.39 % and 3.91 %, respectively, for Class C shares were 1.75 % and 2.86 %, respectively, and for Class I shares were 2.70 % and 4.42 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

10.91%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(7.44%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and the actual characterization of distributions, and may differ from those shown.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to February 3, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Thirty Day Yield Phone

rr_ThirtyDayYieldPhone

For current yield information call 1-800-262-1122.

Eaton Vance Ohio Municipal Income Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ETOHX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.40%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.20%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.03%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.13%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.76%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

549

3 Years

rr_ExpenseExampleYear03

706

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

877

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,372

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

549

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

706

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

877

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,372

Annual Return 2003

rr_AnnualReturn2003

7.46%

Annual Return 2004

rr_AnnualReturn2004

5.31%

Annual Return 2005

rr_AnnualReturn2005

4.99%

Annual Return 2006

rr_AnnualReturn2006

6.86%

Annual Return 2007

rr_AnnualReturn2007

0.58%

Annual Return 2008

rr_AnnualReturn2008

(13.94%)

Annual Return 2009

rr_AnnualReturn2009

23.67%

Annual Return 2010

rr_AnnualReturn2010

(2.15%)

Annual Return 2011

rr_AnnualReturn2011

11.27%

Annual Return 2012

rr_AnnualReturn2012

9.93%

1 Year

rr_AverageAnnualReturnYear01

4.76%

5 Years

rr_AverageAnnualReturnYear05

3.93%

10 Years

rr_AverageAnnualReturnYear10

4.47%

Thirty Day Yield

rr_ThirtyDayYield

2.39%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

3.91%

Eaton Vance Ohio Municipal Income Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECOHX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.40%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.95%

Interest Expense

rr_Component1OtherExpensesOverAssets

0.03%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.13%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.51%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

254

3 Years

rr_ExpenseExampleYear03

477

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

824

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,802

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

154

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

477

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

824

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,802

1 Year

rr_AverageAnnualReturnYear01

8.23%

5 Years

rr_AverageAnnualReturnYear05

4.17%

10 Years

rr_AverageAnnualReturnYear10

4.22%

Thirty Day Yield

rr_ThirtyDayYield

1.75%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

2.86%

Eaton Vance Ohio Municipal Income Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIOHX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.40%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Interest Expense

rr_Component1OtherExpensesOverAssets

0.03%

Expenses other than Interest Expense

rr_Component2OtherExpensesOverAssets

0.13%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.56%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

57

3 Years

rr_ExpenseExampleYear03

179

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

313

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

701

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

57

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

179

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

313

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

701

1 Year

rr_AverageAnnualReturnYear01

10.27%

5 Years

rr_AverageAnnualReturnYear05

5.07%

10 Years

rr_AverageAnnualReturnYear10

5.04%

Thirty Day Yield

rr_ThirtyDayYield

2.70%

Thirty Day Tax Equivalent Yield

rr_ThirtyDayTaxEquivalentYield

4.42%

Eaton Vance Ohio Municipal Income Fund | After Taxes on Distributions | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.75%

5 Years

rr_AverageAnnualReturnYear05

3.93%

10 Years

rr_AverageAnnualReturnYear10

4.46%

Eaton Vance Ohio Municipal Income Fund | After Taxes on Distributions and Sales | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.45%

5 Years

rr_AverageAnnualReturnYear05

3.94%

10 Years

rr_AverageAnnualReturnYear10

4.46%

Eaton Vance Ohio Municipal Income Fund | Barclays Capital Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.78%

5 Years

rr_AverageAnnualReturnYear05

5.90%

10 Years

rr_AverageAnnualReturnYear10

5.10%

Eaton Vance Ohio Municipal Income Fund | Barclays Capital 20 Year Municipal Bond Index

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.01%

5 Years

rr_AverageAnnualReturnYear05

6.81%

10 Years

rr_AverageAnnualReturnYear10

6.01%

XML

Eaton Vance Ohio Municipal Income Fund

Investment Objective

The Fund’s investment objective is to provide current income exempt from regular federal income tax and Ohio state personal income taxes.

Fees and Expenses of the Fund

The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 35 of this Prospectus and page 20 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance Ohio Municipal Income Fund	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Eaton Vance Ohio Municipal Income Fund	Class A	Class C	Class I
Management Fees	0.40%	0.40%	0.40%
Distribution and Service (12b-1) Fees	0.20%	0.95%	none
Interest Expense	0.03%	0.03%	0.03%
Expenses other than Interest Expense	0.13%	0.13%	0.13%
Other Expenses	0.16%	0.16%	0.16%
Total Annual Fund Operating Expenses	0.76%	1.51%	0.56%

Example.  

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance Ohio Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	549	706	877	1,372
Class C	254	477	824	1,802
Class I	57	179	313	701

Expense Example, No Redemption Eaton Vance Ohio Municipal Income Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	549	706	877	1,372
Class C	154	477	824	1,802
Class I	57	179	313	701

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9 % of the average value of its portfolio.

Principal Investment Strategies

Under normal market circumstances, the Fund invests at least 80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in the Fund’s investment objective (the “80% Policy”).  The Fund may invest without limit in obligations the income from which is subject to the federal alternative minimum tax.  At least 75% of net assets normally will be invested in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or BBB or higher by either Standard & Poor’s Ratings Group (“S&P”) or Fitch Ratings (“Fitch”)) or, if unrated, determined by the investment adviser to be of at least investment grade quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser (“junk bonds”). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by the investment adviser.  For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used.  Under normal market conditions, the Fund invests at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.  If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam.  The Fund is “non-diversified” and may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do not apply to U.S. Government securities).  The Fund may purchase or sell derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total return or as a substitute for the purchase or sale of securities.

In pursuing its investment objective, the Fund normally acquires municipal obligations with maturities of ten years or more.  The Fund’s portfolio often has a longer average maturity than is typical of most other funds that invest primarily in municipal obligations.  As a result, the interest rate risk described below may be more significant for the Fund.  The Fund may concentrate 25% or more of its total assets in certain types of municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one or more sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating agencies and generally performs additional credit and investment analysis.  The portfolio manager also may trade securities to seek to minimize taxable capital gains to shareholders.  A portion of the Fund’s distributions generally will be subject to the federal alternative minimum tax.  The Fund may not be suitable for investors subject to the federal alternative minimum tax.

Principal Risks

Municipal Bond Risk.  The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices.  The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.  Less liquid obligations can become more difficult to value and be subject to erratic price movements.  The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Debt Market Risk.  Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted.  Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand.  At other times, the demand for such instruments may exceed the supply in the market.  An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market.  No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Interest Rate Risk.  As interest rates rise, the value of Fund shares is likely to decline.  Conversely, when interest rates decline, the value of Fund shares is likely to rise.  Obligations with longer maturities generally offer higher yields, but involve greater risk because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.  In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay or “call” the obligation.  In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.  Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.

Credit Risk.  Changes in economic conditions or other circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead to defaults. Such defaults may reduce the value of Fund shares and income distributions.  The value of a fixed income security also may decline because of real or perceived concerns about the issuer’s ability to make principal and interest payments.  In addition, the credit rating of securities held by the Fund may be lowered if an issuer’s financial condition changes.  Municipal obligations may be insured as to principal and interest payments.  If the claims-paying ability or other rating of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected.  In the case of an insured bond, the bond’s rating will be deemed to be the higher of the rating assigned to the bond’s issuer or the insurer.

Risk of Lower Rated Investments.  Investments rated below investment grade and comparable unrated securities (“junk bonds”) have speculative characteristics because of the credit risk associated with their issuers.  Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments.  An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs.  Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Derivatives Risk.  The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints.  Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.  When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events.  Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument.  If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.  The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Transactions.  Certain Fund transactions may give rise to a form of leverage.  Such transactions may include, among others, the use of when-issued, delayed delivery or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions.  The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage.  The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements.  Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities.  The loss on leveraged transactions may substantially exceed the initial investment.

Risk of Residual Interest Bonds.  The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond.  The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase.  The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.  As required by applicable accounting standards, the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Sector and Geographic Concentration Risk.  Because the Fund will concentrate its investments in obligations issued by a particular state and may concentrate in certain sectors or types of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for state-specific economic information.

Risks of Principal Only Investments.  Principal only investments entitle the holder to receive par value of such investment if held to maturity.  The values of principal only investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.  The Fund will accrue income on these investments and is required to distribute that income each year.  The Fund may be required to sell securities to obtain cash needed for such income distributions.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.”  Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Tax Risk.  Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund’s income may be taxable to shareholders subject to the federal alternative minimum tax.

Risks Associated with Active Management.  The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective.  Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks.  The Fund is not a complete investment program and you may lose money by investing in the Fund.  All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective.  Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective .  In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund ..  Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.  Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.  Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compare with those of two broad-based securities market indices.  The returns in the bar chart are for Class A shares and do not reflect a sales charge.  If the sales charge was reflected, the returns would be lower.  Past performance (both before and after taxes) is no guarantee of future results.  Updated Fund performance information can be obtained by visiting www.eatonvance.com.  

During the ten years ended December 31, 2012 , the highest quarterly total return for Class A was  10.91% for the quarter ended September 30, 2009, and the lowest quarterly return was -7.44% for the quarter ended December 31, 2010.  For the 30 days ended September 30, 2012 , the SEC yield and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.85%) for Class A shares were 2.39 % and 3.91 %, respectively, for Class C shares were 1.75 % and 2.86 %, respectively, and for Class I shares were 2.70 % and 4.42 %, respectively.  A lower tax rate would result in lower tax-equivalent yields.  For current yield information call 1-800-262-1122.

Average Annual Total Returns Eaton Vance Ohio Municipal Income Fund	1 Year	5 Years	10 Years
Class A	4.76%	3.93%	4.47%
Class A After Taxes on Distributions	4.75%	3.93%	4.46%
Class A After Taxes on Distributions and Sales	4.45%	3.94%	4.46%
Class C	8.23%	4.17%	4.22%
Class I	10.27%	5.07%	5.04%
Barclays Capital Municipal Bond Index	6.78%	5.90%	5.10%
Barclays Capital 20 Year Municipal Bond Index	10.01%	6.81%	6.01%

These returns reflect the maximum sales charge for Class A (4.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.  The Class C performance shown above for the period prior to February 3, 2006 (commencement of operations) is the performance of Class B shares, which has since converted into another share class , adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes.  If adjusted for other expenses, returns would be different.  Investors cannot invest directly in an Index.  

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.  After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.  After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.  Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.