485BPOS

Registration Nos. 033-06533/811-4521

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933/X/

Post-Effective Amendment No. 62/X/

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 /X/

Amendment No. 57/X/

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

Exact Name of Registrant as Specified in Charter

100 East Pratt Street, Baltimore, Maryland 21202
Address of Principal Executive Offices

410-345-2000
Registrant’s Telephone Number, Including Area Code

David Oestreicher

100 East Pratt Street, Baltimore, Maryland 21202
Name and Address of Agent for Service

It is proposed that this filing will become effective (check appropriate box):

/X/Immediately upon filing pursuant to paragraph (b)

//On (date) pursuant to paragraph (b)

//60 days after filing pursuant to paragraph (a)(1)

//On (date) pursuant to paragraph (a)(1)

//75 days after filing pursuant to paragraph (a)(2)

//On (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

//This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Page 2

EXHIBITS

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

Page 3

Signatures

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Baltimore, State of Maryland, this July 17, 2017.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

/s/Edward C. Bernard

By:Edward C. Bernard

Chairman of the Board

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/Edward C. Bernard	Chairman of the Board	July 17, 2017
Edward C. Bernard	(Chief Executive Officer)
/s/Catherine D. Mathews	Treasurer	July 17, 2017
Catherine D. Mathews	(Chief Financial Officer)
	and Vice President
*
Anthony W. Deering	Trustee	July 17, 2017
*
Bruce W. Duncan	Trustee	July 17, 2017
*
Robert J. Gerrard, Jr.	Trustee	July 17, 2017
*
Paul F. McBride	Trustee	July 17, 2017
*
Cecilia E. Rouse	Trustee	July 17, 2017
*
John G. Schreiber	Trustee	July 17, 2017
*
Mark. R. Tercek	Trustee	July 17, 2017
/s/Edward A. Wiese
Edward A. Wiese	Trustee	July 17, 2017

Page 4

*/s/David Oestreicher
David Oestreicher	Vice President and	July 17, 2017
	Attorney-In-Fact

Page 5

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE CAPITAL APPRECIATION FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION & INCOME FUND, INC.

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE EQUITY INCOME FUND, INC.

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.

T. ROWE PRICE GLOBAL MULTI-SECTOR BOND FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE GNMA FUND, INC.

T. ROWE PRICE GOVERNMENT MONEY FUND, INC.

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INDEX TRUST, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERMEDIATE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE LIMITED DURATION INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE MULTI-STRATEGY TOTAL RETURN FUND, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND

T. ROWE PRICE NEW AMERICA GROWTH FUND, INC.
T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE QUANTITATIVE MANAGEMENT FUNDS, INC.

Page 6

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

T. ROWE PRICE STATE TAX-FREE FUNDS, INC.

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE TOTAL RETURN FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

T. ROWE PRICE VALUE FUND, INC.

POWER OF ATTORNEY

RESOLVED, that the Corporation does hereby constitute and authorize Edward C. Bernard, Margery K. Neale, and David Oestreicher, and each of them individually, their true and lawful attorneys and agents to take any and all action and execute any and all instruments which said attorneys and agents may deem necessary or advisable to enable the Corporation/Trust to comply with the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, and any rules, regulations, orders or other requirements of the United States Securities and Exchange Commission thereunder, in connection with the registration under the Securities Act of 1933, as amended, of shares of the Corporation/Trust, to be offered by the Corporation/Trust, and the registration of the Corporation/Trust under the Investment Company Act of 1940, as amended, including specifically, but without limitation of the foregoing, power and authority to sign the name of the Corporation/Trust on its behalf, and to sign the names of each of such directors/trustees and officers on his or her behalf as such director/trustee or officer to any (i) Registration Statement on Form N-1A or N-14 of the Corporation/Trust filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended; (ii) Registration Statement on Form N-1A or N-14 of the Corporation/Trust under the Investment Company Act of 1940, as amended; (iii) amendment or supplement (including, but not limited to, Post-Effective Amendments adding additional series or classes of the Corporation/Trust) to said Registration Statement; and (iv) instruments or documents filed or to be filed as a part of or in connection with such Registration Statement, including Articles Supplementary, Articles of Amendment, and other instruments with respect to the Articles of Incorporation or Master Trust Agreement of the Corporation/Trust.

IN WITNESS WHEREOF, the above named Corporations/Trusts have caused these presents to be signed and the same attested by its Secretary, each thereunto duly authorized by its Board of Directors/Trustees, and each of the undersigned has hereunto set his or her hand and seal as of the day set opposite his or her name.

Page 7

ALL CORPORATIONS/TRUSTS /s/Edward C. Bernard
Edward C. Bernard /s/Catherine D. Mathews	Chairman of the Board (Principal Executive Officer) Director/Trustee	April 27, 2017
Catherine D. Mathews /s/Anthony W. Deering	Treasurer (Principal Financial Officer) Vice President	April 27, 2017
Anthony W. Deering /s/Bruce W. Duncan	Director/Trustee	April 27, 2017
Bruce W. Duncan /s/Robert J. Gerrard, Jr.	Director/Trustee	April 27, 2017
Robert J. Gerrard, Jr. /s/Paul F. McBride	Director/Trustee	April 27, 2017
Paul F. McBride /s/Cecilia E. Rouse	Director/Trustee	April 27, 2017
Cecilia E. Rouse /s/John G. Schreiber	Director/Trustee	April 27, 2017
John G. Schreiber /s/Mark R. Tercek	Director/Trustee	April 27, 2017
Mark R. Tercek	Director/Trustee	April 27, 2017

(Signatures Continued)

Page 8

ROBERT W. SHARPS, Director/Trustee

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE CAPITAL APPRECIATION FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION & INCOME FUND, INC.

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE EQUITY INCOME FUND, INC.

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE INDEX TRUST, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE MULTI-STRATEGY TOTAL RETURN FUND, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND

T. ROWE PRICE NEW AMERICA GROWTH FUND, INC.

T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE QUANTITATIVE MANAGEMENT FUNDS, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE VALUE FUND, INC.

/s/Robert W. Sharps

Robert W. Sharps April 27, 2017

(Signatures Continued)

Page 9

EDWARD A. WIESE, Director/Trustee

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL MULTI-SECTOR BOND FUND, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE GNMA FUND, INC.

T. ROWE PRICE GOVERNMENT MONEY FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INTERMEDIATE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE LIMITED DURATION INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

T. ROWE PRICE STATE TAX-FREE FUNDS, INC.

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

/s/Edward A. Wiese

Edward A. Wiese April 27, 2017

(Signatures Continued)

Page 10

ATTEST:

/s/Darrell N. Braman

Darrell N. Braman, Secretary

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Georgia Tax-Free Bond Fund

T. Rowe Price
Georgia Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Georgia state income taxes by investing primarily in investment-grade Georgia municipal bonds.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Georgia Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - Georgia Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.13%	0.10%	[1]
Total annual fund operating expenses	0.52%	0.49%
Fee waiver/expense reimbursement		(0.05%)	[1]
Total annual fund operating expenses after fee waiver/expense reimbursement	0.52%	0.44%	[1]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Georgia Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	53	167	291	653
I Class	45	147	264	606

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 the fund’s 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 13.8% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Georgia state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Georgia state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Georgia municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Georgia income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Georgia may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Georgia and its municipalities, it is more vulnerable to unfavorable developments in Georgia than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Georgia municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Georgia municipal securities issuers could affect the market values and marketability of all Georgia municipal securities.

As of May 1, 2017, the state of Georgia’s general obligation bonds were rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S&P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). Each rating agency has assigned a stable outlook for the state.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Georgia Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.97%	Worst Quarter	12/31/10	-5.03%

The fund’s return for the three months ended 3/31/17 was 1.02%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - Georgia Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	(0.05%)	3.41%	3.87%	Mar. 31, 1993
Investor Class | Returns after taxes on distributions	(0.06%)	3.41%	3.86%	Mar. 31, 1993
Investor Class | Returns after taxes on distributions and sale of fund shares	1.25%	3.39%	3.83%	Mar. 31, 1993
I Class				Jul. 06, 2017
Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.25%	3.28%	4.25%
Lipper Other States Municipal Debt Funds Average	0.26%	2.76%	3.27%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

Georgia Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
Georgia Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Georgia state income taxes by investing primarily in investment-grade Georgia municipal bonds.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that 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” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s 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 13.8% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

13.80%

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Georgia state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Georgia state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Georgia municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Georgia income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Georgia may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Georgia and its municipalities, it is more vulnerable to unfavorable developments in Georgia than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Georgia municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Georgia municipal securities issuers could affect the market values and marketability of all Georgia municipal securities.

As of May 1, 2017, the state of Georgia’s general obligation bonds were rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S&P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). Each rating agency has assigned a stable outlook for the state.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

Georgia Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.97%	Worst Quarter	12/31/10	-5.03%

The fund’s return for the three months ended 3/31/17 was 1.02%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Georgia Tax-Free Bond Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.13%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.52%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.52%

1 year

rr_ExpenseExampleYear01

$ 53

3 years

rr_ExpenseExampleYear03

167

5 years

rr_ExpenseExampleYear05

291

10 years

rr_ExpenseExampleYear10

$ 653

2007

rr_AnnualReturn2007

2.07%

2008

rr_AnnualReturn2008

(5.38%)

2009

rr_AnnualReturn2009

14.68%

2010

rr_AnnualReturn2010

1.09%

2011

rr_AnnualReturn2011

10.35%

2012

rr_AnnualReturn2012

7.55%

2013

rr_AnnualReturn2013

(2.95%)

2014

rr_AnnualReturn2014

9.58%

2015

rr_AnnualReturn2015

3.46%

2016

rr_AnnualReturn2016

(0.05%)

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.02%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.97%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.03%)

1 Year

rr_AverageAnnualReturnYear01

(0.05%)

5 Years

rr_AverageAnnualReturnYear05

3.41%

10 Years

rr_AverageAnnualReturnYear10

3.87%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1993

Georgia Tax-Free Bond Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.10%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.49%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.44%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

1 year

rr_ExpenseExampleYear01

$ 45

3 years

rr_ExpenseExampleYear03

147

5 years

rr_ExpenseExampleYear05

264

10 years

rr_ExpenseExampleYear10

$ 606

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

Georgia Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.06%)

5 Years

rr_AverageAnnualReturnYear05

3.41%

10 Years

rr_AverageAnnualReturnYear10

3.86%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1993

Georgia Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.25%

5 Years

rr_AverageAnnualReturnYear05

3.39%

10 Years

rr_AverageAnnualReturnYear10

3.83%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1993

Georgia Tax-Free Bond Fund | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.25%

5 Years

rr_AverageAnnualReturnYear05

3.28%

10 Years

rr_AverageAnnualReturnYear10

4.25%

Georgia Tax-Free Bond Fund | Lipper Other States Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.26%

5 Years

rr_AverageAnnualReturnYear05

2.76%

10 Years

rr_AverageAnnualReturnYear10

3.27%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Maryland Short-Term Tax-Free Bond Fund

T. Rowe Price
Maryland Short-Term Tax-Free
Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide the highest level of income exempt from federal and Maryland state and local income taxes consistent with modest fluctuation in principal value.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Maryland Short-Term Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - Maryland Short-Term Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.16%	0.13%	[1]
Total annual fund operating expenses	0.55%	0.52%
Fee waiver/expense reimbursement		(0.08%)	[1]
Total annual fund operating expenses after fee waiver/expense reimbursement	0.55%	0.44%	[1]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Maryland Short-Term Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	56	176	307	689
I Class	45	150	275	637

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 the fund’s 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 35.5% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Maryland state and local income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. While the fund may buy securities of any maturity, the fund's weighted average maturity is not expected to exceed three years. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Maryland Short-Term Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	3/31/09	1.78%	Worst Quarter	12/31/16	-1.15%

The fund’s return for the three months ended 3/31/17 was 0.80%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - Maryland Short-Term Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	(0.24%)	0.46%	1.52%	Jan. 29, 1993
Investor Class | Returns after taxes on distributions	(0.24%)	0.46%	1.52%	Jan. 29, 1993
Investor Class | Returns after taxes on distributions and sale of fund shares	0.18%	0.53%	1.51%	Jan. 29, 1993
I Class				Jul. 06, 2017
Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.23%	0.79%	2.12%
Lipper Short Municipal Debt Funds Average	(0.11%)	0.62%	1.56%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

Maryland Short-Term Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
Maryland Short-Term Tax-Free
Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide the highest level of income exempt from federal and Maryland state and local income taxes consistent with modest fluctuation in principal value.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that 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” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s 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 35.5% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

35.50%

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Maryland state and local income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. While the fund may buy securities of any maturity, the fund's weighted average maturity is not expected to exceed three years. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

Maryland Short-Term Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	3/31/09	1.78%	Worst Quarter	12/31/16	-1.15%

The fund’s return for the three months ended 3/31/17 was 0.80%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Maryland Short-Term Tax-Free Bond Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.16%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.55%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.55%

1 year

rr_ExpenseExampleYear01

$ 56

3 years

rr_ExpenseExampleYear03

176

5 years

rr_ExpenseExampleYear05

307

10 years

rr_ExpenseExampleYear10

$ 689

2007

rr_AnnualReturn2007

3.75%

2008

rr_AnnualReturn2008

3.35%

2009

rr_AnnualReturn2009

3.76%

2010

rr_AnnualReturn2010

0.76%

2011

rr_AnnualReturn2011

1.38%

2012

rr_AnnualReturn2012

0.72%

2013

rr_AnnualReturn2013

0.73%

2014

rr_AnnualReturn2014

0.63%

2015

rr_AnnualReturn2015

0.48%

2016

rr_AnnualReturn2016

(0.24%)

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.80%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.78%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2016

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(1.15%)

1 Year

rr_AverageAnnualReturnYear01

(0.24%)

5 Years

rr_AverageAnnualReturnYear05

0.46%

10 Years

rr_AverageAnnualReturnYear10

1.52%

Inception date

rr_AverageAnnualReturnInceptionDate

Jan. 29, 1993

Maryland Short-Term Tax-Free Bond Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.13%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.52%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.08%)

^[2]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.44%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

1 year

rr_ExpenseExampleYear01

$ 45

3 years

rr_ExpenseExampleYear03

150

5 years

rr_ExpenseExampleYear05

275

10 years

rr_ExpenseExampleYear10

$ 637

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

Maryland Short-Term Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.24%)

5 Years

rr_AverageAnnualReturnYear05

0.46%

10 Years

rr_AverageAnnualReturnYear10

1.52%

Inception date

rr_AverageAnnualReturnInceptionDate

Jan. 29, 1993

Maryland Short-Term Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.18%

5 Years

rr_AverageAnnualReturnYear05

0.53%

10 Years

rr_AverageAnnualReturnYear10

1.51%

Inception date

rr_AverageAnnualReturnInceptionDate

Jan. 29, 1993

Maryland Short-Term Tax-Free Bond Fund | Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.23%

5 Years

rr_AverageAnnualReturnYear05

0.79%

10 Years

rr_AverageAnnualReturnYear10

2.12%

Maryland Short-Term Tax-Free Bond Fund | Lipper Short Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.11%)

5 Years

rr_AverageAnnualReturnYear05

0.62%

10 Years

rr_AverageAnnualReturnYear10

1.56%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Maryland Tax-Free Bond Fund

T. Rowe Price
Maryland Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Maryland state and local income taxes by investing primarily in investment-grade Maryland municipal bonds.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Maryland Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - Maryland Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.07%	0.05%
Total annual fund operating expenses	0.46%	0.44%

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Maryland Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	47	148	258	579
I Class	45	141	246	555

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 the fund’s 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 14.1% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Maryland state and local income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. While the fund may buy securities of any maturity, the fund's weighted average maturity is not expected to exceed three years. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Maryland Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	7.22%	Worst Quarter	12/31/10	-4.36%

The fund’s return for the three months ended 3/31/17 was 1.23%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - Maryland Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.90%	3.56%	4.14%	Mar. 31, 1987
Investor Class | Returns after taxes on distributions	0.90%	3.55%	4.13%	Mar. 31, 1987
Investor Class | Returns after taxes on distributions and sale of fund shares	1.98%	3.60%	4.13%	Mar. 31, 1987
I Class				Jul. 06, 2017
Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.25%	3.28%	4.25%
Lipper Maryland Municipal Debt Funds Average	1.16%	2.39%	2.96%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

Maryland Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
Maryland Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Maryland state and local income taxes by investing primarily in investment-grade Maryland municipal bonds.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that 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” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s 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 14.1% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

14.10%

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, that your investment has a 5% return each year, and that the fund’s 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

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Maryland state and local income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. While the fund may buy securities of any maturity, the fund's weighted average maturity is not expected to exceed three years. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

Maryland Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	7.22%	Worst Quarter	12/31/10	-4.36%

The fund’s return for the three months ended 3/31/17 was 1.23%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Maryland Tax-Free Bond Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.07%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.46%

1 year

rr_ExpenseExampleYear01

$ 47

3 years

rr_ExpenseExampleYear03

148

5 years

rr_ExpenseExampleYear05

258

10 years

rr_ExpenseExampleYear10

$ 579

2007

rr_AnnualReturn2007

1.90%

2008

rr_AnnualReturn2008

(6.67%)

2009

rr_AnnualReturn2009

17.98%

2010

rr_AnnualReturn2010

1.99%

2011

rr_AnnualReturn2011

10.08%

2012

rr_AnnualReturn2012

7.56%

2013

rr_AnnualReturn2013

(2.75%)

2014

rr_AnnualReturn2014

9.35%

2015

rr_AnnualReturn2015

3.20%

2016

rr_AnnualReturn2016

0.90%

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.23%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.22%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(4.36%)

1 Year

rr_AverageAnnualReturnYear01

0.90%

5 Years

rr_AverageAnnualReturnYear05

3.56%

10 Years

rr_AverageAnnualReturnYear10

4.14%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1987

Maryland Tax-Free Bond Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.05%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.44%

1 year

rr_ExpenseExampleYear01

$ 45

3 years

rr_ExpenseExampleYear03

141

5 years

rr_ExpenseExampleYear05

246

10 years

rr_ExpenseExampleYear10

$ 555

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

Maryland Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.90%

5 Years

rr_AverageAnnualReturnYear05

3.55%

10 Years

rr_AverageAnnualReturnYear10

4.13%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1987

Maryland Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.98%

5 Years

rr_AverageAnnualReturnYear05

3.60%

10 Years

rr_AverageAnnualReturnYear10

4.13%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 1987

Maryland Tax-Free Bond Fund | Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.25%

5 Years

rr_AverageAnnualReturnYear05

3.28%

10 Years

rr_AverageAnnualReturnYear10

4.25%

Maryland Tax-Free Bond Fund | Lipper Maryland Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.16%

5 Years

rr_AverageAnnualReturnYear05

2.39%

10 Years

rr_AverageAnnualReturnYear10

2.96%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

XML

Maryland Tax-Free Money Fund

T. Rowe Price
Maryland Tax-Free Money Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide preservation of capital, liquidity, and, consistent with these objectives, the highest level of income exempt from federal and Maryland state and local income taxes.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Maryland Tax-Free Money Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - Maryland Tax-Free Money Fund		Investor Class		I Class
Management fees	[1]	0.39%		0.39%
Distribution and service (12b-1) fees
Other expenses		0.28%		0.23%	[2]
Total annual fund operating expenses		0.67%		0.62%
Fee waiver/expense reimbursement	[1]	(0.12%)	[3],[4]	(0.29%)	[2]
Total annual fund operating expenses after fee waiver/expense reimbursement	[1]	0.55%	[3],[4],[5]	0.33%	[2]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Maryland Tax-Free Money Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	56	190	349	811
I Class	34	139	287	717

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest at least 65% of its total assets in Maryland municipal securities, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. The fund is a retail money market fund managed in compliance with Rule 2a-7 under the Investment Company Act of 1940, as amended. The fund qualifies as a “retail money market fund” pursuant to Rule 2a-7.

In accordance with the requirements for “retail money market funds” under Rule 2a-7, the fund has implemented policies and procedures designed to limit new investments in the fund to accounts beneficially owned by natural persons. The fund has also obtained assurances from its intermediaries that they have developed adequate procedures to limit accounts to only those beneficially owned by natural persons. Any new investors wishing to purchase shares may be required to demonstrate eligibility (for example, by providing their Social Security number).

Pursuant to Rule 2a-7, if the fund’s weekly liquid assets fall below 30% of its total assets, the fund’s Board of Trustees, in its discretion, may impose liquidity fees of up to 2% of the value of the shares redeemed or temporarily suspend redemptions from the fund for up to 10 business days during any 90-day period (i.e., a “redemption gate”). In addition, if the fund’s weekly liquid assets fall below 10% of its total assets at the end of any business day, the fund must impose a 1% liquidity fee on shareholder redemptions unless the fund’s Board of Trustees determines that not doing so is in the best interests of the fund. Pursuant to Rule 2a-7, weekly liquid assets include cash, U.S. Treasuries, other government securities with remaining maturities of 60 days or less, or securities that mature or are subject to a demand feature within five business days.

The securities purchased by the fund are subject to the maturity, credit quality, diversification, and other requirements of Rule 2a-7. All securities purchased by the fund present minimal credit risk in the opinion of T. Rowe Price. The fund is managed to provide a stable share price of $1.00 by investing in high-quality U.S. dollar-denominated municipal money market securities. Money market securities are generally high-quality, short-term obligations issued by companies or governmental entities. The fund’s weighted average maturity will not exceed 60 calendar days, the fund’s weighted average life will not exceed 120 calendar days, and the fund will not purchase any security with a remaining maturity longer than 397 calendar days (unless otherwise permitted by Rule 2a-7, such as certain variable and floating rate instruments). When calculating its weighted average maturity, the fund may shorten its maturity by using the interest rate resets of certain adjustable rate securities. The fund may not take into account these resets when calculating its weighted average life.

In selecting securities for the fund, the portfolio manager may examine relationships among yields of various types and maturities of money market securities in the context of interest rate outlooks. The fund’s yield will fluctuate with changes in short-term interest rates.

Up to 20% of the fund’s income could be derived from securities that are subject to the alternative minimum tax.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

Principal Risks

As with any mutual fund, there can be no guarantee the fund will achieve its objective. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund’s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. T. Rowe Price Associates, Inc. has no legal obligation to provide financial support to the fund, and you should not expect that T. Rowe Price Associates, Inc. will provide financial support to the fund at any time.

Money funds have experienced significant pressures from shareholder redemptions, issuer credit downgrades, illiquid markets, and historically low yields on the securities they can hold. There have been a very small number of money funds in other fund complexes that have “broken the buck,” which means that those funds’ investors did not receive $1.00 per share for their investment in those funds. The potential for realizing a loss of principal in the fund could derive from:

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. The credit quality of the securities held by the fund may change rapidly in certain market environments, which could result in significant net asset value deterioration and the inability to maintain a $1.00 share price.

Interest rate risks A decline in interest rates may lower the fund’s yield, or a rise in the overall level of interest rates may cause a decline in the prices of fixed income securities held by the fund. The fund’s yield will vary; it is not fixed for a specific period like the yield on a bank certificate of deposit. This is a disadvantage when interest rates are falling because the fund would have to reinvest at lower interest rates. During periods of extremely low or negative short-term interest rates, the fund may not be able to maintain a positive yield or yields on par with historical levels or, at times, maintain a stable $1.00 share price. A sharp and unexpected rise in interest rates could increase the likelihood that the fund’s share price will drop below a dollar.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at its current carrying value. The fund may experience heavy redemptions, particularly during periods of declining or illiquid markets, which could cause the fund to liquidate its assets at inopportune times or at a depressed value and affect the fund’s ability to maintain a $1.00 share price. The secondary market for certain municipal bonds tends to be less developed and liquid than many other securities markets, which may adversely affect the fund’s ability to sell such municipal bonds at attractive prices. In addition, the fund’s Board has discretion to temporarily suspend fund redemptions, to impose a liquidity fee, or to liquidate the fund if the fund’s weekly liquid assets fall below 10%.

Stable net asset value risks The fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, money market funds in general, including the fund, could experience significant redemption activity. This could reduce the market prices of securities held by the fund and make it more difficult for the fund to maintain a stable $1.00 share price. The fund’s shareholders should not rely on or expect the fund’s investment adviser or an affiliate to purchase distressed assets from the fund, enter into capital support agreements with the fund, make capital infusions into the fund, or take other actions to help the fund maintain a stable $1.00 share price.

Redemption risks The fund may be subject to periods of increased redemptions that could cause the fund to sell its assets at disadvantageous times or at a depressed value or loss, particularly during periods of declining or illiquid markets, and that could affect the fund’s ability to maintain a stable $1.00 share price. Periods of heavy redemptions may result in the fund’s level of weekly liquid assets falling below certain minimums required by Rule 2a-7 may result in the fund’s Board of Directors/Trustees imposing a liquidity fee or redemption gate.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Maryland Tax-Free Money Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	6/30/07	0.81%	Worst Quarter	6/30/15	0.00%

The fund’s return for the three months ended 3/31/17 was 0.01%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - Maryland Tax-Free Money Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.01%	0.01%	0.51%	Mar. 30, 2001
I Class				Jul. 06, 2017
Lipper Other States Tax-Exempt Money Market Funds Average	0.12%	0.04%	0.54%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive a portion of its management fee in order to limit the fund’s management fee to 0.28% of the fund’s average daily net assets. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Fees waived under this agreement are not subject to reimbursement to T. Rowe Price Associates, Inc., by the fund.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

[3] Restated to reflect current fees.

[4] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses) that would cause the fund’s ratio of expenses to average daily net assets to exceed 0.55%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Subject to shareholder approval, fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s expense ratio is below 0.55%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.55% (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses).

[5] The figure shown in the fee table does not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure includes the effect of voluntary management fee waivers.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

Maryland Tax-Free Money Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
Maryland Tax-Free Money Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide preservation of capital, liquidity, and, consistent with these objectives, the highest level of income exempt from federal and Maryland state and local income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest at least 65% of its total assets in Maryland municipal securities, and at least 80% of the fund’s income is expected to be exempt from federal and Maryland state and local income taxes. The fund is a retail money market fund managed in compliance with Rule 2a-7 under the Investment Company Act of 1940, as amended. The fund qualifies as a “retail money market fund” pursuant to Rule 2a-7.

In accordance with the requirements for “retail money market funds” under Rule 2a-7, the fund has implemented policies and procedures designed to limit new investments in the fund to accounts beneficially owned by natural persons. The fund has also obtained assurances from its intermediaries that they have developed adequate procedures to limit accounts to only those beneficially owned by natural persons. Any new investors wishing to purchase shares may be required to demonstrate eligibility (for example, by providing their Social Security number).

Pursuant to Rule 2a-7, if the fund’s weekly liquid assets fall below 30% of its total assets, the fund’s Board of Trustees, in its discretion, may impose liquidity fees of up to 2% of the value of the shares redeemed or temporarily suspend redemptions from the fund for up to 10 business days during any 90-day period (i.e., a “redemption gate”). In addition, if the fund’s weekly liquid assets fall below 10% of its total assets at the end of any business day, the fund must impose a 1% liquidity fee on shareholder redemptions unless the fund’s Board of Trustees determines that not doing so is in the best interests of the fund. Pursuant to Rule 2a-7, weekly liquid assets include cash, U.S. Treasuries, other government securities with remaining maturities of 60 days or less, or securities that mature or are subject to a demand feature within five business days.

The securities purchased by the fund are subject to the maturity, credit quality, diversification, and other requirements of Rule 2a-7. All securities purchased by the fund present minimal credit risk in the opinion of T. Rowe Price. The fund is managed to provide a stable share price of $1.00 by investing in high-quality U.S. dollar-denominated municipal money market securities. Money market securities are generally high-quality, short-term obligations issued by companies or governmental entities. The fund’s weighted average maturity will not exceed 60 calendar days, the fund’s weighted average life will not exceed 120 calendar days, and the fund will not purchase any security with a remaining maturity longer than 397 calendar days (unless otherwise permitted by Rule 2a-7, such as certain variable and floating rate instruments). When calculating its weighted average maturity, the fund may shorten its maturity by using the interest rate resets of certain adjustable rate securities. The fund may not take into account these resets when calculating its weighted average life.

In selecting securities for the fund, the portfolio manager may examine relationships among yields of various types and maturities of money market securities in the context of interest rate outlooks. The fund’s yield will fluctuate with changes in short-term interest rates.

Up to 20% of the fund’s income could be derived from securities that are subject to the alternative minimum tax.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Maryland municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Maryland income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there can be no guarantee the fund will achieve its objective. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund’s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. T. Rowe Price Associates, Inc. has no legal obligation to provide financial support to the fund, and you should not expect that T. Rowe Price Associates, Inc. will provide financial support to the fund at any time.

Money funds have experienced significant pressures from shareholder redemptions, issuer credit downgrades, illiquid markets, and historically low yields on the securities they can hold. There have been a very small number of money funds in other fund complexes that have “broken the buck,” which means that those funds’ investors did not receive $1.00 per share for their investment in those funds. The potential for realizing a loss of principal in the fund could derive from:

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. The credit quality of the securities held by the fund may change rapidly in certain market environments, which could result in significant net asset value deterioration and the inability to maintain a $1.00 share price.

Interest rate risks A decline in interest rates may lower the fund’s yield, or a rise in the overall level of interest rates may cause a decline in the prices of fixed income securities held by the fund. The fund’s yield will vary; it is not fixed for a specific period like the yield on a bank certificate of deposit. This is a disadvantage when interest rates are falling because the fund would have to reinvest at lower interest rates. During periods of extremely low or negative short-term interest rates, the fund may not be able to maintain a positive yield or yields on par with historical levels or, at times, maintain a stable $1.00 share price. A sharp and unexpected rise in interest rates could increase the likelihood that the fund’s share price will drop below a dollar.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Maryland may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Maryland and its municipalities, it is more vulnerable to unfavorable developments in Maryland than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Maryland municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Maryland municipal securities issuers could affect the market values and marketability of all Maryland municipal securities.

As of May 1, 2017, the state of Maryland’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S & P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). All three agencies have assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at its current carrying value. The fund may experience heavy redemptions, particularly during periods of declining or illiquid markets, which could cause the fund to liquidate its assets at inopportune times or at a depressed value and affect the fund’s ability to maintain a $1.00 share price. The secondary market for certain municipal bonds tends to be less developed and liquid than many other securities markets, which may adversely affect the fund’s ability to sell such municipal bonds at attractive prices. In addition, the fund’s Board has discretion to temporarily suspend fund redemptions, to impose a liquidity fee, or to liquidate the fund if the fund’s weekly liquid assets fall below 10%.

Stable net asset value risks The fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, money market funds in general, including the fund, could experience significant redemption activity. This could reduce the market prices of securities held by the fund and make it more difficult for the fund to maintain a stable $1.00 share price. The fund’s shareholders should not rely on or expect the fund’s investment adviser or an affiliate to purchase distressed assets from the fund, enter into capital support agreements with the fund, make capital infusions into the fund, or take other actions to help the fund maintain a stable $1.00 share price.

Redemption risks The fund may be subject to periods of increased redemptions that could cause the fund to sell its assets at disadvantageous times or at a depressed value or loss, particularly during periods of declining or illiquid markets, and that could affect the fund’s ability to maintain a stable $1.00 share price. Periods of heavy redemptions may result in the fund’s level of weekly liquid assets falling below certain minimums required by Rule 2a-7 may result in the fund’s Board of Directors/Trustees imposing a liquidity fee or redemption gate.

Risk Lose Money [Text]

rr_RiskLoseMoney

You could lose money by investing in the fund.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

Maryland Tax-Free Money Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	6/30/07	0.81%	Worst Quarter	6/30/15	0.00%

The fund’s return for the three months ended 3/31/17 was 0.01%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Maryland Tax-Free Money Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.67%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[2],[3],[4]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.55%

^{[2],[3],[4],[5]}

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current fees.

1 year

rr_ExpenseExampleYear01

$ 56

3 years

rr_ExpenseExampleYear03

190

5 years

rr_ExpenseExampleYear05

349

10 years

rr_ExpenseExampleYear10

$ 811

2007

rr_AnnualReturn2007

3.14%

2008

rr_AnnualReturn2008

1.82%

2009

rr_AnnualReturn2009

0.15%

2010

rr_AnnualReturn2010

0.01%

2011

rr_AnnualReturn2011

0.01%

2012

rr_AnnualReturn2012

0.01%

2013

rr_AnnualReturn2013

0.01%

2014

rr_AnnualReturn2014

0.01%

2015

rr_AnnualReturn2015

0.01%

2016

rr_AnnualReturn2016

0.01%

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.01%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2007

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

0.81%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

none

1 Year

rr_AverageAnnualReturnYear01

0.01%

5 Years

rr_AverageAnnualReturnYear05

0.01%

10 Years

rr_AverageAnnualReturnYear10

0.51%

Inception date

rr_AverageAnnualReturnInceptionDate

Mar. 30, 2001

Maryland Tax-Free Money Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.23%

^[6]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.62%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.29%)

^[2],[6]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.33%

^[2],[6]

1 year

rr_ExpenseExampleYear01

$ 34

3 years

rr_ExpenseExampleYear03

139

5 years

rr_ExpenseExampleYear05

287

10 years

rr_ExpenseExampleYear10

$ 717

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

Maryland Tax-Free Money Fund | Lipper Other States Tax-Exempt Money Market Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.12%

5 Years

rr_AverageAnnualReturnYear05

0.04%

10 Years

rr_AverageAnnualReturnYear10

0.54%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive a portion of its management fee in order to limit the fund’s management fee to 0.28% of the fund’s average daily net assets. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Fees waived under this agreement are not subject to reimbursement to T. Rowe Price Associates, Inc., by the fund.

[3] Restated to reflect current fees.

[4] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses) that would cause the fund’s ratio of expenses to average daily net assets to exceed 0.55%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Subject to shareholder approval, fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s expense ratio is below 0.55%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.55% (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses).

[5] The figure shown in the fee table does not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure includes the effect of voluntary management fee waivers.

[6] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

New Jersey Tax-Free Bond Fund

T. Rowe Price
New Jersey Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and New Jersey state income taxes by investing primarily in investment-grade New Jersey municipal bonds.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - New Jersey Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - New Jersey Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.13%	0.09%	[1]
Total annual fund operating expenses	0.52%	0.48%
Fee waiver/expense reimbursement		(0.04%)	[1]
Total annual fund operating expenses after fee waiver/expense reimbursement	0.52%	0.44%	[1]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - New Jersey Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	53	167	291	653
I Class	45	146	261	596

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 the fund’s 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 10.0% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and New Jersey state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and New Jersey state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New Jersey municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New Jersey income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New Jersey may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New Jersey and its municipalities, it is more vulnerable to unfavorable developments in New Jersey than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New Jersey municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New Jersey municipal securities issuers could affect the market values and marketability of all New Jersey municipal securities. New Jersey faces significant future pension and other post-employment benefit liabilities, which could lessen the state’s financial strength and increase its overall credit risk.

As of May 1, 2017, the state of New Jersey’s general obligation debt was rated A3 by Moody’s Investors Service, Inc. (Moody’s), A- by S & P Global Ratings (S&P), and A by Fitch Ratings, Inc. (Fitch). S&P has assigned a negative outlook, while Moody’s and Fitch have both assigned a stable outlook, for their ratings.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

New Jersey Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.88%	Worst Quarter	12/31/10	-4.48%

The fund’s return for the three months ended 3/31/17 was 1.14%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - New Jersey Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.56%	3.65%	4.00%	Apr. 30, 1991
Investor Class | Returns after taxes on distributions	0.56%	3.65%	4.00%	Apr. 30, 1991
Investor Class | Returns after taxes on distributions and sale of fund shares	1.71%	3.64%	3.98%	Apr. 30, 1991
I Class				Jul. 06, 2017
Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.25%	3.28%	4.25%
Lipper New Jersey Municipal Debt Funds Average	0.56%	3.05%	3.38%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

New Jersey Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
New Jersey Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and New Jersey state income taxes by investing primarily in investment-grade New Jersey municipal bonds.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that 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” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s 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 10.0% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

10.00%

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and New Jersey state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and New Jersey state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New Jersey municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New Jersey income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New Jersey may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New Jersey and its municipalities, it is more vulnerable to unfavorable developments in New Jersey than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New Jersey municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New Jersey municipal securities issuers could affect the market values and marketability of all New Jersey municipal securities. New Jersey faces significant future pension and other post-employment benefit liabilities, which could lessen the state’s financial strength and increase its overall credit risk.

As of May 1, 2017, the state of New Jersey’s general obligation debt was rated A3 by Moody’s Investors Service, Inc. (Moody’s), A- by S & P Global Ratings (S&P), and A by Fitch Ratings, Inc. (Fitch). S&P has assigned a negative outlook, while Moody’s and Fitch have both assigned a stable outlook, for their ratings.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

New Jersey Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.88%	Worst Quarter	12/31/10	-4.48%

The fund’s return for the three months ended 3/31/17 was 1.14%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

New Jersey Tax-Free Bond Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.13%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.52%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.52%

1 year

rr_ExpenseExampleYear01

$ 53

3 years

rr_ExpenseExampleYear03

167

5 years

rr_ExpenseExampleYear05

291

10 years

rr_ExpenseExampleYear10

$ 653

2007

rr_AnnualReturn2007

1.82%

2008

rr_AnnualReturn2008

(5.20%)

2009

rr_AnnualReturn2009

14.40%

2010

rr_AnnualReturn2010

1.95%

2011

rr_AnnualReturn2011

9.96%

2012

rr_AnnualReturn2012

8.04%

2013

rr_AnnualReturn2013

(3.15%)

2014

rr_AnnualReturn2014

10.19%

2015

rr_AnnualReturn2015

3.18%

2016

rr_AnnualReturn2016

0.56%

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.14%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.88%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(4.48%)

1 Year

rr_AverageAnnualReturnYear01

0.56%

5 Years

rr_AverageAnnualReturnYear05

3.65%

10 Years

rr_AverageAnnualReturnYear10

4.00%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

New Jersey Tax-Free Bond Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.09%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.48%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[2]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.44%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

1 year

rr_ExpenseExampleYear01

$ 45

3 years

rr_ExpenseExampleYear03

146

5 years

rr_ExpenseExampleYear05

261

10 years

rr_ExpenseExampleYear10

$ 596

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

New Jersey Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.56%

5 Years

rr_AverageAnnualReturnYear05

3.65%

10 Years

rr_AverageAnnualReturnYear10

4.00%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

New Jersey Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.71%

5 Years

rr_AverageAnnualReturnYear05

3.64%

10 Years

rr_AverageAnnualReturnYear10

3.98%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

New Jersey Tax-Free Bond Fund | Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.25%

5 Years

rr_AverageAnnualReturnYear05

3.28%

10 Years

rr_AverageAnnualReturnYear10

4.25%

New Jersey Tax-Free Bond Fund | Lipper New Jersey Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.56%

5 Years

rr_AverageAnnualReturnYear05

3.05%

10 Years

rr_AverageAnnualReturnYear10

3.38%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

New York Tax-Free Bond Fund

T. Rowe Price
New York Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal, New York state, and New York City income taxes by investing primarily in investment-grade New York municipal bonds.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - New York Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - New York Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.12%	0.08%	[1]
Total annual fund operating expenses	0.51%	0.47%
Fee waiver/expense reimbursement		(0.03%)	[1]
Total annual fund operating expenses after fee waiver/expense reimbursement	0.51%	0.44%	[1]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - New York Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	52	164	285	640
I Class	45	145	257	586

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 the fund’s 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 7.7% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal, New York state, and New York City income taxes, and at least 80% of the fund’s income is expected to be exempt from federal, New York state, and New York City income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New York municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New York income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New York may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New York and its municipalities, it is more vulnerable to unfavorable developments in New York than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New York municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New York municipal securities issuers could affect the market values and marketability of all New York municipal securities. Due to New York City’s prominent role in the financial markets, New York’s overall economy can be heavily dependent on the financial sector and tends to be more sensitive to monetary policy actions and movements in the national and global economies than other states.

As of May 1, 2017, the state of New York’s general obligation debt was rated Aa1 by Moody’s Investors Service, Inc. (Moody’s), AA+ by S&P Global Ratings (S&P), and AA+ by Fitch Ratings, Inc. (Fitch). Moody’s, S&P and Fitch have all assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

New York Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	7.04%	Worst Quarter	12/31/10	-4.52%

The fund’s return for the three months ended 3/31/17 was 1.26%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - New York Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.39%	3.61%	4.04%	Aug. 28, 1986
Investor Class | Returns after taxes on distributions	0.39%	3.61%	4.03%	Aug. 28, 1986
Investor Class | Returns after taxes on distributions and sale of fund shares	1.65%	3.61%	4.00%	Aug. 28, 1986
I Class				Jul. 06, 2017
Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.25%	3.28%	4.25%
Lipper New York Municipal Debt Funds Average	0.46%	3.18%	3.49%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

New York Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
New York Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal, New York state, and New York City income taxes by investing primarily in investment-grade New York municipal bonds.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that 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” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s 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 7.7% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

7.70%

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal, New York state, and New York City income taxes, and at least 80% of the fund’s income is expected to be exempt from federal, New York state, and New York City income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New York municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New York income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New York may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New York and its municipalities, it is more vulnerable to unfavorable developments in New York than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New York municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New York municipal securities issuers could affect the market values and marketability of all New York municipal securities. Due to New York City’s prominent role in the financial markets, New York’s overall economy can be heavily dependent on the financial sector and tends to be more sensitive to monetary policy actions and movements in the national and global economies than other states.

As of May 1, 2017, the state of New York’s general obligation debt was rated Aa1 by Moody’s Investors Service, Inc. (Moody’s), AA+ by S&P Global Ratings (S&P), and AA+ by Fitch Ratings, Inc. (Fitch). Moody’s, S&P and Fitch have all assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

New York Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	7.04%	Worst Quarter	12/31/10	-4.52%

The fund’s return for the three months ended 3/31/17 was 1.26%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

New York Tax-Free Bond Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.12%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.51%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.51%

1 year

rr_ExpenseExampleYear01

$ 52

3 years

rr_ExpenseExampleYear03

164

5 years

rr_ExpenseExampleYear05

285

10 years

rr_ExpenseExampleYear10

$ 640

2007

rr_AnnualReturn2007

2.56%

2008

rr_AnnualReturn2008

(5.54%)

2009

rr_AnnualReturn2009

14.52%

2010

rr_AnnualReturn2010

1.64%

2011

rr_AnnualReturn2011

10.33%

2012

rr_AnnualReturn2012

8.12%

2013

rr_AnnualReturn2013

(3.81%)

2014

rr_AnnualReturn2014

10.33%

2015

rr_AnnualReturn2015

3.68%

2016

rr_AnnualReturn2016

0.39%

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.26%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.04%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(4.52%)

1 Year

rr_AverageAnnualReturnYear01

0.39%

5 Years

rr_AverageAnnualReturnYear05

3.61%

10 Years

rr_AverageAnnualReturnYear10

4.04%

Inception date

rr_AverageAnnualReturnInceptionDate

Aug. 28, 1986

New York Tax-Free Bond Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.08%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.47%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[2]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.44%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

1 year

rr_ExpenseExampleYear01

$ 45

3 years

rr_ExpenseExampleYear03

145

5 years

rr_ExpenseExampleYear05

257

10 years

rr_ExpenseExampleYear10

$ 586

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

New York Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.39%

5 Years

rr_AverageAnnualReturnYear05

3.61%

10 Years

rr_AverageAnnualReturnYear10

4.03%

Inception date

rr_AverageAnnualReturnInceptionDate

Aug. 28, 1986

New York Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.65%

5 Years

rr_AverageAnnualReturnYear05

3.61%

10 Years

rr_AverageAnnualReturnYear10

4.00%

Inception date

rr_AverageAnnualReturnInceptionDate

Aug. 28, 1986

New York Tax-Free Bond Fund | Bloomberg Barclays 1-3 Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.25%

5 Years

rr_AverageAnnualReturnYear05

3.28%

10 Years

rr_AverageAnnualReturnYear10

4.25%

New York Tax-Free Bond Fund | Lipper New York Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.46%

5 Years

rr_AverageAnnualReturnYear05

3.18%

10 Years

rr_AverageAnnualReturnYear10

3.49%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

New York Tax-Free Money Fund

T. Rowe Price
New York Tax-Free Money Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide preservation of capital, liquidity, and, consistent with these objectives, the highest level of income exempt from federal, New York state, and New York City income taxes.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - New York Tax-Free Money Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - New York Tax-Free Money Fund		Investor Class		I Class
Management fees	[1]	0.39%		0.39%
Distribution and service (12b-1) fees
Other expenses		0.45%		0.32%	[2]
Total annual fund operating expenses		0.84%		0.71%
Fee waiver/expense reimbursement	[1]	(0.29%)	[3]	(0.38%)	[2]
Total annual fund operating expenses after fee waiver/expense reimbursement	[1]	0.55%	[3],[4]	0.33%	[2]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - New York Tax-Free Money Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	56	209	407	982
I Class	34	149	318	809

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest at least 65% of its total assets in New York municipal securities, and at least 80% of the fund’s income is expected to be exempt from federal, New York state, and New York City income taxes. The fund is a retail money market fund managed in compliance with Rule 2a-7 under the Investment Company Act of 1940, as amended. The fund qualifies as a “retail money market fund” pursuant to Rule 2a-7.

In accordance with the requirements for “retail money market funds” under Rule 2a-7, the fund has implemented policies and procedures designed to limit new investments in the fund to accounts beneficially owned by natural persons. The fund has also obtained assurances from its intermediaries that they have developed adequate procedures to limit accounts to only those beneficially owned by natural persons. Any new investors wishing to purchase shares may be required to demonstrate eligibility (for example, by providing their Social Security number).

Pursuant to Rule 2a-7, if the fund’s weekly liquid assets fall below 30% of its total assets, the fund’s Board of Trustees, in its discretion, may impose liquidity fees of up to 2% of the value of the shares redeemed or temporarily suspend redemptions from the fund for up to 10 business days during any 90-day period (i.e., a “redemption gate”). In addition, if the fund’s weekly liquid assets fall below 10% of its total assets at the end of any business day, the fund must impose a 1% liquidity fee on shareholder redemptions unless the fund’s Board of Trustees determines that not doing so is in the best interests of the fund. Pursuant to Rule 2a-7, weekly liquid assets include cash, U.S. Treasuries, other government securities with remaining maturities of 60 days or less, or securities that mature or are subject to a demand feature within five business days.

The securities purchased by the fund are subject to the maturity, credit quality, diversification, and other requirements of Rule 2a-7. All securities purchased by the fund present minimal credit risk in the opinion of T. Rowe Price. The fund is managed to provide a stable share price of $1.00 by investing in high-quality U.S. dollar-denominated municipal money market securities. Money market securities are generally high-quality, short-term obligations issued by companies or governmental entities. The fund’s weighted average maturity will not exceed 60 calendar days, the fund’s weighted average life will not exceed 120 calendar days, and the fund will not purchase any security with a remaining maturity longer than 397 calendar days (unless otherwise permitted by Rule 2a-7, such as certain variable and floating rate instruments). When calculating its weighted average maturity, the fund may shorten its maturity by using the interest rate resets of certain adjustable rate securities. The fund may not take into account these resets when calculating its weighted average life.

In selecting securities for the fund, the portfolio manager may examine relationships among yields of various types and maturities of money market securities in the context of interest rate outlooks. The fund’s yield will fluctuate with changes in short-term interest rates.

Up to 20% of the fund’s income could be derived from securities that are subject to the alternative minimum tax.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New York municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New York income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

Principal Risks

As with any mutual fund, there can be no guarantee the fund will achieve its objective. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund’s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. T. Rowe Price Associates, Inc. has no legal obligation to provide financial support to the fund, and you should not expect that T. Rowe Price Associates, Inc. will provide financial support to the fund at any time.

Money funds have experienced significant pressures from shareholder redemptions, issuer credit downgrades, illiquid markets, and historically low yields on the securities they can hold. There have been a very small number of money funds in other fund complexes that have “broken the buck,” which means that those funds’ investors did not receive $1.00 per share for their investment in those funds. The potential for realizing a loss of principal in the fund could derive from:

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. The credit quality of the securities held by the fund may change rapidly in certain market environments, which could result in significant net asset value deterioration and the inability to maintain a $1.00 share price.

Interest rate risks A decline in interest rates may lower the fund’s yield, or a rise in the overall level of interest rates may cause a decline in the prices of fixed income securities held by the fund. The fund’s yield will vary; it is not fixed for a specific period like the yield on a bank certificate of deposit. This is a disadvantage when interest rates are falling because the fund would have to reinvest at lower interest rates. During periods of extremely low or negative short-term interest rates, the fund may not be able to maintain a positive yield or yields on par with historical levels or, at times, maintain a stable $1.00 share price. A sharp and unexpected rise in interest rates could increase the likelihood that the fund’s share price will drop below a dollar.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New York may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New York and its municipalities, it is more vulnerable to unfavorable developments in New York than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New York municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New York municipal securities issuers could affect the market values and marketability of all New York municipal securities. Due to New York City’s prominent role in the financial markets, New York’s overall economy can be heavily dependent on the financial sector and tends to be more sensitive to monetary policy actions and movements in the national and global economies than other states.

As of May 1, 2017, the state of New York’s general obligation debt was rated Aa1 by Moody’s Investors Service, Inc. (Moody’s), AA+ by S&P Global Ratings (S&P), and AA+ by Fitch Ratings, Inc. (Fitch). Moody’s, S&P and Fitch have all assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at its current carrying value. The fund may experience heavy redemptions, particularly during periods of declining or illiquid markets, which could cause the fund to liquidate its assets at inopportune times or at a depressed value and affect the fund’s ability to maintain a $1.00 share price. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other securities markets, which may adversely affect the fund’s ability to sell such municipal bonds at attractive prices. In addition, the fund’s Board has discretion to temporarily suspend fund redemptions, to impose a liquidity fee, or to liquidate the fund if the fund’s weekly liquid assets fall below 10%.

Stable net asset value risks The fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, money market funds in general, including the fund, could experience significant redemption activity. This could reduce the market prices of securities held by the fund and make it more difficult for the fund to maintain a stable $1.00 share price. The fund’s shareholders should not rely on or expect the fund’s investment adviser or an affiliate to purchase distressed assets from the fund, enter into capital support agreements with the fund, make capital infusions into the fund, or take other actions to help the fund maintain a stable $1.00 share price.

Redemption risks The fund may be subject to periods of increased redemptions that could cause the fund to sell its assets at disadvantageous times or at a depressed value or loss, particularly during periods of declining or illiquid markets, and that could affect the fund’s ability to maintain a stable $1.00 share price. Periods of heavy redemptions may result in the fund’s level of weekly liquid assets falling below certain minimums required by Rule 2a-7, which may result in the fund’s Board of Trustees imposing a liquidity fee or redemption gate.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

New York Tax-Free Money Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	6/30/07	0.80%	Worst Quarter	6/30/15	0.00%

The fund’s return for the three months ended 3/31/17 was 0.04%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - New York Tax-Free Money Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.04%	0.02%	0.50%	Aug. 28, 1986
I Class				Jul. 06, 2017
Lipper New York Tax-Exempt Money Market Funds Index (reflects no deduction for fees, expenses, or taxes)	0.12%	0.04%	0.52%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive a portion of its management fee in order to limit the fund’s management fee to 0.28% of the fund’s average daily net assets. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Fees waived under this agreement are not subject to reimbursement to T. Rowe Price Associates, Inc., by the fund.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

[3] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.55%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Subject to shareholder approval, fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the class’ expense ratio is below 0.55%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.55% (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses).

[4] The figure shown in the fee table does not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure includes the effect of voluntary management fee waivers.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

New York Tax-Free Money Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
New York Tax-Free Money Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide preservation of capital, liquidity, and, consistent with these objectives, the highest level of income exempt from federal, New York state, and New York City income taxes.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will invest at least 65% of its total assets in New York municipal securities, and at least 80% of the fund’s income is expected to be exempt from federal, New York state, and New York City income taxes. The fund is a retail money market fund managed in compliance with Rule 2a-7 under the Investment Company Act of 1940, as amended. The fund qualifies as a “retail money market fund” pursuant to Rule 2a-7.

In accordance with the requirements for “retail money market funds” under Rule 2a-7, the fund has implemented policies and procedures designed to limit new investments in the fund to accounts beneficially owned by natural persons. The fund has also obtained assurances from its intermediaries that they have developed adequate procedures to limit accounts to only those beneficially owned by natural persons. Any new investors wishing to purchase shares may be required to demonstrate eligibility (for example, by providing their Social Security number).

Pursuant to Rule 2a-7, if the fund’s weekly liquid assets fall below 30% of its total assets, the fund’s Board of Trustees, in its discretion, may impose liquidity fees of up to 2% of the value of the shares redeemed or temporarily suspend redemptions from the fund for up to 10 business days during any 90-day period (i.e., a “redemption gate”). In addition, if the fund’s weekly liquid assets fall below 10% of its total assets at the end of any business day, the fund must impose a 1% liquidity fee on shareholder redemptions unless the fund’s Board of Trustees determines that not doing so is in the best interests of the fund. Pursuant to Rule 2a-7, weekly liquid assets include cash, U.S. Treasuries, other government securities with remaining maturities of 60 days or less, or securities that mature or are subject to a demand feature within five business days.

The securities purchased by the fund are subject to the maturity, credit quality, diversification, and other requirements of Rule 2a-7. All securities purchased by the fund present minimal credit risk in the opinion of T. Rowe Price. The fund is managed to provide a stable share price of $1.00 by investing in high-quality U.S. dollar-denominated municipal money market securities. Money market securities are generally high-quality, short-term obligations issued by companies or governmental entities. The fund’s weighted average maturity will not exceed 60 calendar days, the fund’s weighted average life will not exceed 120 calendar days, and the fund will not purchase any security with a remaining maturity longer than 397 calendar days (unless otherwise permitted by Rule 2a-7, such as certain variable and floating rate instruments). When calculating its weighted average maturity, the fund may shorten its maturity by using the interest rate resets of certain adjustable rate securities. The fund may not take into account these resets when calculating its weighted average life.

In selecting securities for the fund, the portfolio manager may examine relationships among yields of various types and maturities of money market securities in the context of interest rate outlooks. The fund’s yield will fluctuate with changes in short-term interest rates.

Up to 20% of the fund’s income could be derived from securities that are subject to the alternative minimum tax.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable New York municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not New York income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there can be no guarantee the fund will achieve its objective. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund’s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. T. Rowe Price Associates, Inc. has no legal obligation to provide financial support to the fund, and you should not expect that T. Rowe Price Associates, Inc. will provide financial support to the fund at any time.

Money funds have experienced significant pressures from shareholder redemptions, issuer credit downgrades, illiquid markets, and historically low yields on the securities they can hold. There have been a very small number of money funds in other fund complexes that have “broken the buck,” which means that those funds’ investors did not receive $1.00 per share for their investment in those funds. The potential for realizing a loss of principal in the fund could derive from:

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. The credit quality of the securities held by the fund may change rapidly in certain market environments, which could result in significant net asset value deterioration and the inability to maintain a $1.00 share price.

Interest rate risks A decline in interest rates may lower the fund’s yield, or a rise in the overall level of interest rates may cause a decline in the prices of fixed income securities held by the fund. The fund’s yield will vary; it is not fixed for a specific period like the yield on a bank certificate of deposit. This is a disadvantage when interest rates are falling because the fund would have to reinvest at lower interest rates. During periods of extremely low or negative short-term interest rates, the fund may not be able to maintain a positive yield or yields on par with historical levels or, at times, maintain a stable $1.00 share price. A sharp and unexpected rise in interest rates could increase the likelihood that the fund’s share price will drop below a dollar.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in New York may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by New York and its municipalities, it is more vulnerable to unfavorable developments in New York than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall New York municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of New York municipal securities issuers could affect the market values and marketability of all New York municipal securities. Due to New York City’s prominent role in the financial markets, New York’s overall economy can be heavily dependent on the financial sector and tends to be more sensitive to monetary policy actions and movements in the national and global economies than other states.

As of May 1, 2017, the state of New York’s general obligation debt was rated Aa1 by Moody’s Investors Service, Inc. (Moody’s), AA+ by S&P Global Ratings (S&P), and AA+ by Fitch Ratings, Inc. (Fitch). Moody’s, S&P and Fitch have all assigned a stable outlook.

Liquidity risks The fund may not be able to sell a holding in a timely manner at its current carrying value. The fund may experience heavy redemptions, particularly during periods of declining or illiquid markets, which could cause the fund to liquidate its assets at inopportune times or at a depressed value and affect the fund’s ability to maintain a $1.00 share price. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other securities markets, which may adversely affect the fund’s ability to sell such municipal bonds at attractive prices. In addition, the fund’s Board has discretion to temporarily suspend fund redemptions, to impose a liquidity fee, or to liquidate the fund if the fund’s weekly liquid assets fall below 10%.

Stable net asset value risks The fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, money market funds in general, including the fund, could experience significant redemption activity. This could reduce the market prices of securities held by the fund and make it more difficult for the fund to maintain a stable $1.00 share price. The fund’s shareholders should not rely on or expect the fund’s investment adviser or an affiliate to purchase distressed assets from the fund, enter into capital support agreements with the fund, make capital infusions into the fund, or take other actions to help the fund maintain a stable $1.00 share price.

Redemption risks The fund may be subject to periods of increased redemptions that could cause the fund to sell its assets at disadvantageous times or at a depressed value or loss, particularly during periods of declining or illiquid markets, and that could affect the fund’s ability to maintain a stable $1.00 share price. Periods of heavy redemptions may result in the fund’s level of weekly liquid assets falling below certain minimums required by Rule 2a-7, which may result in the fund’s Board of Trustees imposing a liquidity fee or redemption gate.

Risk Lose Money [Text]

rr_RiskLoseMoney

You could lose money by investing in the fund.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance and is not necessarily an indication of future results.

Bar Chart [Heading]

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New York Tax-Free Money Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

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	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	6/30/07	0.80%	Worst Quarter	6/30/15	0.00%

The fund’s return for the three months ended 3/31/17 was 0.04%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a comparative index that has investment characteristics similar to those of the fund.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

New York Tax-Free Money Fund | Investor Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.45%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.84%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.29%)

^[2],[3]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.55%

^[2],[3],[4]

1 year

rr_ExpenseExampleYear01

$ 56

3 years

rr_ExpenseExampleYear03

209

5 years

rr_ExpenseExampleYear05

407

10 years

rr_ExpenseExampleYear10

$ 982

2007

rr_AnnualReturn2007

3.11%

2008

rr_AnnualReturn2008

1.74%

2009

rr_AnnualReturn2009

0.15%

2010

rr_AnnualReturn2010

0.01%

2011

rr_AnnualReturn2011

0.01%

2012

rr_AnnualReturn2012

0.01%

2013

rr_AnnualReturn2013

0.01%

2014

rr_AnnualReturn2014

0.01%

2015

rr_AnnualReturn2015

0.01%

2016

rr_AnnualReturn2016

0.04%

Year to Date Return, Label

rr_YearToDateReturnLabel

The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.04%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2007

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

0.80%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

none

1 Year

rr_AverageAnnualReturnYear01

0.04%

5 Years

rr_AverageAnnualReturnYear05

0.02%

10 Years

rr_AverageAnnualReturnYear10

0.50%

Inception date

rr_AverageAnnualReturnInceptionDate

Aug. 28, 1986

New York Tax-Free Money Fund | I Class

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.32%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.71%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.38%)

^[2],[5]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.33%

^[2],[5]

1 year

rr_ExpenseExampleYear01

$ 34

3 years

rr_ExpenseExampleYear03

149

5 years

rr_ExpenseExampleYear05

318

10 years

rr_ExpenseExampleYear10

$ 809

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

New York Tax-Free Money Fund | Lipper New York Tax-Exempt Money Market Funds Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.12%

5 Years

rr_AverageAnnualReturnYear05

0.04%

10 Years

rr_AverageAnnualReturnYear10

0.52%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive a portion of its management fee in order to limit the fund’s management fee to 0.28% of the fund’s average daily net assets. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Fees waived under this agreement are not subject to reimbursement to T. Rowe Price Associates, Inc., by the fund.

[3] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.55%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees. Subject to shareholder approval, fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the class’ expense ratio is below 0.55%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.55% (excluding interest; expenses related to borrowings, taxes and brokerage; extraordinary expenses; and acquired fund fees and expenses).

[4] The figure shown in the fee table does not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure includes the effect of voluntary management fee waivers.

[5] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Virginia Tax-Free Bond Fund

T. Rowe Price
Virginia Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Investment Objective

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Virginia state income taxes by investing primarily in investment-grade Virginia municipal bonds.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Virginia Tax-Free Bond Fund - USD ($)	Investor Class		I Class
Maximum account fee	$ 20	[1]

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses - Virginia Tax-Free Bond Fund	Investor Class	I Class
Management fees	0.39%	0.39%
Distribution and service (12b-1) fees
Other expenses	0.08%	0.06%	[1]
Total annual fund operating expenses	0.47%	0.45%
Fee waiver/expense reimbursement		(0.01%)	[1]
Total annual fund operating expenses after fee waiver/expense reimbursement	0.47%	0.44%	[1]

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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Virginia Tax-Free Bond Fund - USD ($)	1 year	3 years	5 years	10 years
Investor Class	48	151	263	591
I Class	45	142	250	565

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 the fund’s 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 11.8% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Virginia state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Virginia state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Virginia municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Virginia income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Virginia may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Virginia and its municipalities, it is more vulnerable to unfavorable developments in Virginia than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Virginia municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Virginia municipal securities issuers could affect the market values and marketability of all Virginia municipal securities.

As of May 1, 2017, the Commonwealth of Virginia’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S&P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). While Moody’s and Fitch maintain their stable outlook on Virginia, S&P recently revised its outlook to negative, primarily based on a budgeted drawdown in reserves.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Virginia Tax-Free Bond Fund
Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.80%	Worst Quarter	12/31/10	-4.88%

The fund’s return for the three months ended 3/31/17 was 1.15%.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Average Annual Total Returns

Periods ended
December 31, 2016

Average Annual Total Returns - Virginia Tax-Free Bond Fund	1 Year	5 Years	10 Years	Inception date
Investor Class	0.70%	3.43%	4.07%	Apr. 30, 1991
Investor Class | Returns after taxes on distributions	0.70%	3.43%	4.07%	Apr. 30, 1991
Investor Class | Returns after taxes on distributions and sale of fund shares	1.78%	3.46%	4.03%	Apr. 30, 1991
I Class				Jul. 06, 2017
Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)	0.25%	3.28%	4.25%
Lipper Virginia Municipal Debt Funds Average	0.89%	2.61%	2.79%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price State Tax-Free Income Trust

Prospectus Date

rr_ProspectusDate

Jul. 01, 2017

Virginia Tax-Free Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. Rowe Price
Virginia Tax-Free Bond Fund

Investor Class

I Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide, consistent with prudent portfolio management, the highest level of income exempt from federal and Virginia state income taxes by investing primarily in investment-grade Virginia municipal bonds.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

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 also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 the fund’s 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 11.8% of the average value of its portfolio.

Portfolio Turnover, Rate

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11.80%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

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The fund will invest so that, under normal market conditions, at least 80% of its net assets (including any borrowings for investment purposes) are invested in bonds that pay interest exempt from federal and Virginia state income taxes, and at least 80% of the fund’s income is expected to be exempt from federal and Virginia state income taxes. While the fund may buy securities of any maturity, the fund generally seeks longer-term securities. Most investments are in investment-grade securities (rated in one of the four highest rating categories assigned by established credit rating agencies) from at least one major credit rating agency or, if unrated, deemed to be of comparable quality by T. Rowe Price. However, the fund may invest up to 10% of its total assets in noninvestment-grade securities, known as “junk” bonds, including those with the lowest credit rating. In addition, up to 20% of the fund’s income could be derived from securities subject to the alternative minimum tax.

Investment decisions generally reflect the portfolio manager’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities. This approach is designed to help the portfolio manager capture appreciation opportunities when rates are falling and reduce the impact of falling bond prices when rates are rising. For example, if interest rates are expected to fall, the fund may purchase longer-term securities in an attempt to seek higher yields and/or capital appreciation. Conversely, if interest rates are expected to rise, the fund may seek securities with shorter maturities. And if our economic outlook is positive or if valuations for lower-quality bonds are attractive, the portfolio manager may favor noninvestment-grade bonds to the extent permitted by the fund’s investment policies.

The fund may invest a significant portion of assets in securities that are not general obligations of the state. These may be issued by local governments or public authorities and are rated according to their particular creditworthiness, which may vary from the state’s general obligation securities. From time to time, the fund may invest a significant portion of its assets in sectors with special risks, such as health care, transportation, utilities, or private activity bonds.

Due to seasonal variations in the supply of suitable Virginia municipal securities, the fund may invest in other municipal securities whose interest is exempt from federal but not Virginia income taxes. While efforts will be made to minimize such investments, they could comprise up to 10% of the fund’s annual income.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

The fund is “nondiversified,” meaning it may invest a greater portion of its assets in fewer issuers than is permissible for a “diversified” fund.

Risk [Heading]

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Principal Risks

Risk Narrative [Text Block]

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As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risks The investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies.

Market risks The value of investments owned by the fund may go up or down, sometimes rapidly or unexpectedly, due to factors affecting the overall markets, or particular industries or sectors.

Credit risks An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default, rating downgrade, or inability to meet a financial obligation. Economic downturns often result in reduced levels of taxes collected and revenues earned for municipalities, and a municipal government’s pension or health care related obligations to its employees may exceed its available assets or income. These conditions can lessen the financial strength of a municipality and increase the credit risk of the securities it issues. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade bonds (“junk” bonds). Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Interest rate risks Prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, securities with longer maturities or durations, and funds with longer weighted average maturities or durations, carry greater interest rate risk. The fund may face a heightened level of interest rate risk since the U.S. Federal Reserve Board has ended its quantitative easing program and may continue to raise rates. The fund may be subject to greater interest rate risk due to the current period of historically low interest rates and the potential effect of any government fiscal policy initiatives. While a rise in interest rates is the principal source of interest rate risk for bond funds, falling rates bring the possibility that a bond may be “called,” or redeemed before maturity, and that the proceeds may be reinvested in lower-yielding securities.

Municipal securities risks The fund may be highly impacted by events tied to the overall municipal securities markets, which can be very volatile and significantly affected by unfavorable legislative or political developments and adverse changes in the financial conditions of municipal securities issuers and the economy. Income from municipal securities held by the fund could be declared taxable because of changes in tax laws or interpretations by taxing authorities, or noncompliant conduct of a municipality. Tax reform, including a lowering of individual or corporate tax rates, could reduce the attractiveness and overall demand for municipal bonds. In addition, a portion of the fund’s otherwise tax-exempt dividends may be taxable to those shareholders subject to the alternative minimum tax.

Certain sectors of the municipal bond market have special risks that can impact such sectors more significantly than the market as a whole. For example: health care can be negatively impacted by rising expenses and dependency on third party reimbursements; transportation can be negatively impacted by declining revenues or unexpectedly high construction or fuel costs; utilities are subject to governmental rate regulation; and private activity bonds rely on project revenues and the creditworthiness of the corporate user as opposed to governmental support. Investing significantly in municipal obligations backed by revenues of similar types of industries or projects may make the fund more susceptible to developments affecting those industries and projects.

State-specific risks Developments in Virginia may adversely affect the securities held by the fund. Because the fund invests primarily in securities issued by Virginia and its municipalities, it is more vulnerable to unfavorable developments in Virginia than are funds that invest in municipal securities of many states. Adverse developments in an economic sector may have far-reaching impacts on the overall Virginia municipal securities market. A bond default or credit rating downgrade, or even negative perceptions of the ability to make timely bond payments, involving only a small number of Virginia municipal securities issuers could affect the market values and marketability of all Virginia municipal securities.

As of May 1, 2017, the Commonwealth of Virginia’s general obligation debt was rated Aaa by Moody’s Investors Service, Inc. (Moody’s) and AAA by S&P Global Ratings (S&P) and Fitch Ratings, Inc. (Fitch). While Moody’s and Fitch maintain their stable outlook on Virginia, S&P recently revised its outlook to negative, primarily based on a budgeted drawdown in reserves.

Liquidity risks The fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. The secondary market for certain municipal bonds tends to be less developed and less liquid than many other bond markets. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Risk Lose Money [Text]

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The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Risk Nondiversified Status [Text]

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Nondiversification risks As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

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The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

Performance Information Illustrates Variability of Returns [Text]

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The following performance information provides some indication of the risks of investing in the fund.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses.

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

Performance Availability Website Address [Text]

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troweprice.com

Performance Past Does Not Indicate Future [Text]

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The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

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Virginia Tax-Free Bond Fund
Calendar Year Returns

Bar Chart Closing [Text Block]

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	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/09	6.80%	Worst Quarter	12/31/10	-4.88%

The fund’s return for the three months ended 3/31/17 was 1.15%.

Performance Table Heading

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Average Annual Total Returns

Periods ended
December 31, 2016

Performance Table Uses Highest Federal Rate

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After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

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Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Narrative

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The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes.

Performance Table Closing [Text Block]

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Updated performance information is available through troweprice.com.

Virginia Tax-Free Bond Fund | Investor Class

Risk/Return:

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Maximum account fee

rr_MaximumAccountFee

$ 20

^[1]

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.08%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.47%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.47%

1 year

rr_ExpenseExampleYear01

$ 48

3 years

rr_ExpenseExampleYear03

151

5 years

rr_ExpenseExampleYear05

263

10 years

rr_ExpenseExampleYear10

$ 591

2007

rr_AnnualReturn2007

2.24%

2008

rr_AnnualReturn2008

(3.82%)

2009

rr_AnnualReturn2009

14.39%

2010

rr_AnnualReturn2010

1.14%

2011

rr_AnnualReturn2011

10.68%

2012

rr_AnnualReturn2012

7.30%

2013

rr_AnnualReturn2013

(3.50%)

2014

rr_AnnualReturn2014

9.84%

2015

rr_AnnualReturn2015

3.38%

2016

rr_AnnualReturn2016

0.70%

Year to Date Return, Label

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The fund’s return for the three months ended

Bar Chart, Year to Date Return, Date

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Mar. 31, 2017

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.15%

Highest Quarterly Return, Label

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Best Quarter

Highest Quarterly Return, Date

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Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.80%

Lowest Quarterly Return, Label

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Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

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(4.88%)

1 Year

rr_AverageAnnualReturnYear01

0.70%

5 Years

rr_AverageAnnualReturnYear05

3.43%

10 Years

rr_AverageAnnualReturnYear10

4.07%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

Virginia Tax-Free Bond Fund | I Class

Risk/Return:

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Maximum account fee

rr_MaximumAccountFee

Management fees

rr_ManagementFeesOverAssets

0.39%

Distribution and service (12b-1) fees

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Other expenses

rr_OtherExpensesOverAssets

0.06%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.45%

Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[2]

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

0.44%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2019

1 year

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$ 45

3 years

rr_ExpenseExampleYear03

142

5 years

rr_ExpenseExampleYear05

250

10 years

rr_ExpenseExampleYear10

$ 565

1 Year

rr_AverageAnnualReturnYear01

5 Years

rr_AverageAnnualReturnYear05

10 Years

rr_AverageAnnualReturnYear10

Inception date

rr_AverageAnnualReturnInceptionDate

Jul. 06, 2017

Virginia Tax-Free Bond Fund | Returns after taxes on distributions | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.70%

5 Years

rr_AverageAnnualReturnYear05

3.43%

10 Years

rr_AverageAnnualReturnYear10

4.07%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

Virginia Tax-Free Bond Fund | Returns after taxes on distributions and sale of fund shares | Investor Class

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.78%

5 Years

rr_AverageAnnualReturnYear05

3.46%

10 Years

rr_AverageAnnualReturnYear10

4.03%

Inception date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 1991

Virginia Tax-Free Bond Fund | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.25%

5 Years

rr_AverageAnnualReturnYear05

3.28%

10 Years

rr_AverageAnnualReturnYear10

4.25%

Virginia Tax-Free Bond Fund | Lipper Virginia Municipal Debt Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.89%

5 Years

rr_AverageAnnualReturnYear05

2.61%

10 Years

rr_AverageAnnualReturnYear10

2.79%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] T. Rowe Price Associates, Inc., has agreed (through June 30, 2019) to pay the operating expenses of the fund’s I Class excluding management fees; interest; expenses related to borrowings, taxes and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses (“I Class Operating Expenses”), to the extent the I Class Operating Expenses exceed 0.05% of the class’ average daily net assets. Any expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the fund’s I Class Operating Expenses are below 0.05%. However, no reimbursement will be made more than three years after the payment of the I Class Operating Expenses or if such reimbursement would cause the fund’s I Class Operating Expenses to exceed 0.05%. The agreement may be terminated at any time beyond June 30, 2019, with approval by the fund’s Board of Trustees.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	T. Rowe Price State Tax-Free Income Trust
Prospectus Date	rr_ProspectusDate	Jul. 01, 2017
Document Creation Date	dei_DocumentCreationDate	Jun. 28, 2017