Summary Prospectus dated February 1, 2010

as revised March 25, 2010

Eaton Vance National Municipal Income Fund

Class /Ticker     A / EANAX      B / EVHMX      C / ECHMX      I / EIHMX

This Summary Prospectus is designed to provide investors with key fund information in a clear and concise format. Before you invest, you may want to review the Fund’s Prospectus and Statement of Additional Information, which contain more information about the Fund and its risks. The Fund’s Prospectus dated February 1, 2010, as supplemented, and Statement of Additional Information, dated February 1, 2010, are incorporated by reference into this Summary Prospectus. For free paper or electronic copies of the Fund’s Prospectus, Statement of Additional Information, and for other information about the Fund, go to http://funddocuments.eatonvance.com, email a request to contact@eatonvance.com, call 1-800-262-1122, or ask any financial advisor, bank, or broker-dealer who offers shares of the Fund. Unless otherwise noted, page number references refer to the current prospectus for this 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

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 11 of the Fund’s Prospectus and page 19 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)		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)		Class A	Class B	Class C	Class I
Management Fees		0.36%	0.36%	0.36%	0.36%
Distribution and Service (12b-1) Fees		0.25%	1.00%	1.00%	n/a
Interest Expense(1)	0.23%
Expenses other than Interest Expense	0.09% (0.08% for Class I)
Other Expenses		0.32%	0.32%	0.32%	0.31%
Total Annual Fund Operating Expenses		0.93%	1.68%	1.68%	0.67%

(1) Interest Expense relates to the Fund’s liability with respect to floating rate notes held by third parties in conjunction with residual interest bond transactions by the Fund. The Fund also records offsetting
interest income in an amount equal to this expense relating to the municipal obligations underlying such transactions and, as a result, net asset value and performance have not been affected by this
expense. If Interest Expense was not included, Total Annual Fund Operating Expenses would have been 0.70% for Class A, 1.45% for Class B and Class C, and 0.44% for Class I. See “Investment Objective
& Principal Policies and Risks" in the Fund’s Prospectus for a description of these transactions.

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:

		Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Class A shares	$565	$757	$965	$1,564	$565	$757	$965	$1,564
Class B shares	$671	$930	$1,113	$1,788	$171	$530	$913	$1,788
Class C shares	$271	$530	$913	$1,987	$171	$530	$913	$1,987
Class I shares	$68	$214	$373	$835	$68	$214	$373	$ 835

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its 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 46% 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 will normally 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 Services, 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 may purchase derivative instruments (such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts).

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 economic sectors (such as housing, hospitals, healthcare facilities or utilities).

The investment adviser’s process for selecting obligations for purchase and sale is research intensive and emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative value of the obligation in the market. Although the investment adviser considers ratings when making investment decisions, it performs its own credit and investment analysis and does not rely primarily on the ratings assigned by the rating services. 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.

Principal Risks

Municipal Bond Market Risk. The amount of public information available about municipal bonds is generally less than that for corporate equities or bonds and the investment performance of the Fund may be more dependent on the analytical abilities of the investment adviser than would be the case for a stock fund or corporate bond fund. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may adversely affect the Fund’s ability to sell its bonds at attractive prices. In addition, municipal obligations can experience downturns in trading activity and the supply of municipal obligations may exceed the demand in the market. During such periods, the spread can widen between the price at which an obligation can be purchased and the price at which it can be sold. Less liquid obligations can become more difficult to value and be subject to erratic price movements. Economic and other events (whether real or perceived) can reduce the demand for certain investments or for investments generally, which may reduce market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. The increased presence of non-traditional participants in the municipal markets may lead to greater volatility in the markets.

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 typically 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 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 Securities. Investments in obligations rated below investment grade and comparable unrated securities 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-

Eaton Vance National Municipal Income Fund

2

Summary Prospectus dated February 1, 2010, as revised March 25, 2010

payment rate, and a lower rated investment may lose significant value before a default occurs. Lower rated investments generally 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 investment leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivative risks may be more significant when they are used to enhance return or as a substitute for a position or security, rather than solely to hedge the risk of a position or securitiy held by the Fund. Derivatives for hedging purposes may not reduce risk if they are not sufficiently correlated to the position being hedged. 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 security or currency. The loss on derivative transactions may substantially exceed the initial investment.

Risk of Leveraged Investments. 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 rates increase. The value and market for residual interest bonds are volatile and such bonds may have limited liquidity.

Sector Concentration Risk. Because the Fund concentrates its investments in certain types of municipal obligations and may concentrate in certain sectors, the value of Fund shares will be affected by events that adversely affect that sector or type of obligation and may fluctuate more than that of a less concentrated fund.

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 that 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. In general, the Fund’s Annual Fund Operating Expenses as a percentage of Fund average daily net assets will change as Fund assets increase and decrease, and the Fund’s 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 objective. 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. You may lose money by investing in the Fund.

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 indicies. If the sales charge was reflected, the returns would be lower. Returns in the table for Class B 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, 2009, the highest quarterly total return for Class B was 16.40% for the quarter ended September 30, 2009, and the lowest quarterly return was -18.97% for the quarter
ended December 31, 2008. For the 30 days ended September 30, 2009, the SEC yield and SEC tax-equivalent yield (assuming a federal income tax rate of 35.00%) for Class A shares were 4.97% and 7.65%,
respectively, for Class B shares were 4.50% and 6.92%, respectively, for Class C shares were 4.49% and 6.91%, respectively, and for Class I shares were 5.47%, and 8.42%, respectively. A lower tax rate
would result in lower tax-equivalent yields. For current yield information call 1-800-262-1122.

Eaton Vance National Municipal Income Fund

3

Summary Prospectus dated February 1, 2010, as revised March 25, 2010

Average Annual Total Return as of December 31, 2009	One Year	Five Years	Ten Years
Class A Return Before Taxes	33.15%	1.16%	4.69%
Class B Return Before Taxes	33.94%	1.06%	4.61%
Class B Return After Taxes on Distributions	33.93%	1.06%	4.61%
Class B Return After Taxes on Distributions and the Sale of Class B Shares	24.34%	1.55%	4.71%
Class C Return Before Taxes	37.94%	1.39%	4.42%
Class I Return Before Taxes	40.27%	2.42%	5.52%
Barclays Capital Municipal Bond Index (reflects no deduction for fees, expenses or taxes)	12.91%	4.32%	5.75%
Barclays Capital Long (22+) Municipal Bond Index (reflects no deduction for fees, expenses or taxes)	23.43%	3.88%	6.28%

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. Barclays Capital Municipal Bond Index (formerly Lehman Brothers Municipal Bond Index) is an unmanaged index of municipal bonds. Barclays Capital Long (22+) Municipal Bond Index (formerly Lehman Brothers Municipal Bond Long 22+ Index) is the long bond component of the Barclays Capital Municipal Bond Index. Investors cannot invest directly in an Index. (Source for Barclays Capital Municipal Bond Index and Barclays Capital Long (22+) Municipal Bond Index is Lipper, Inc.)

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 B 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.

Management

Investment Adviser. Boston Management and Research ("BMR").

Portfolio Manager. The Fund is managed by Thomas M. Metzold, Vice President of BMR, who has managed the Fund since 1991.

Purchase and Sale of Fund Shares

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to Eaton Vance Funds, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-262-1122. The minimum initial purchase or exchange into the Fund is $1,000 for Class A, Class B and Class C and $250,000 for Class I (waived in certain circumstances). There is no minimum for subsequent investments.

Tax Information

The Fund’s distributions are expected to be exempt from regular federal income tax. Distributions of any net realized gains are expected to be taxable.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase Fund shares through a broker-dealer or other financial intermediary (such as a bank) (collectively, "financial intermediaries"), the Fund, its principal underwriter and its affiliates may pay the financial intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s web site for more information.

4273-3/10 HMSP

© 2010 Eaton Vance Management

Eaton Vance National Municipal Income Fund

4

Summary Prospectus dated February 1, 2010, as revised March 25, 2010