Supplement to the

Fidelity Massachusetts AMT Tax-Free Money Market Fund (FMSXX),
Fidelity^® Massachusetts Municipal Income Fund (FDMMX), and
Fidelity Massachusetts Municipal Money Market Fund (FDMXX)

Fidelity Massachusetts AMT Tax-Free Money Market Fund is a Class of shares of
Fidelity Massachusetts AMT Tax-Free Money Market Fund

Funds of Fidelity Massachusetts Municipal Trust

STATEMENT OF ADDITIONAL INFORMATION

April 1, 2010

For Fidelity Massachusetts AMT Tax-Free Money Market Fund and Fidelity Massachusetts Municipal Money Market Fund, the following information replaces the similar information regarding each fund's non-fundamental investment limitation with respect to illiquid securities in the "Investment Policies and Limitations" section beginning on page 3.

The fund does not currently intend to purchase any security if, as a result, more than 5% of its total assets would be invested in securities that are deemed to be illiquid because they are subject to legal or contractual restrictions on resale or because they cannot be sold or disposed of in the ordinary course of business within seven days at approximately the value ascribed to it by the fund.

For purposes of each fund's illiquid securities limitation discussed above, if through a change in values, net assets, or other circumstances, the fund were in a position where more than 5% of its total assets were invested in illiquid securities, it would consider appropriate steps to protect liquidity.

For Fidelity Massachusetts AMT Tax-Free Money Market Fund and Fidelity Massachusetts Municipal Money Market Fund, the following information supplements the information in the "Fund Holdings Information" section beginning on page 53.

Beginning on or before October 7, 2010, the funds will provide a full list of holdings as of the last business day of the previous month on the web site. This information will be provided monthly by no later than the fifth business day of each month. The information will be available on the web site for a period of not less than six months.

The following information replaces the similar information found in the "Management Contracts" section on page 45.

Kevin Ramundo is the portfolio manager of Fidelity Massachusetts Municipal Income Fund and receives compensation for his services. As of June 30, 2010, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of the portfolio manager's compensation may be deferred based on criteria established by FMR or at the election of the portfolio manager.

The portfolio manager's base salary is determined by level of responsibility and tenure at FMR or its affiliates. The primary components of the portfolio manager's bonus are based on (i) the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index assigned to each fund or account, and (ii) the investment performance of other FMR municipal bond funds and accounts. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to his tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with his tenure, but that eventually encompasses rolling periods of up to three years for the comparison to a benchmark index. A smaller, subjective component of the portfolio manager's bonus is based on the portfolio manager's overall contribution to management of FMR. The portion of the portfolio manager's bonus that is linked to the investment performance of Fidelity Massachusetts Municipal Income Fund is based on the fund's pre-tax investment performance measured against the Barclays Capital Massachusetts 3+ Year Enhanced Municipal Bond Index. The portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement, and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

The portfolio manager's compensation plan may give rise to potential conflicts of interest. Although investors in the fund may invest through either tax-deferred accounts or taxable accounts, the portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. The portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as the portfolio manager must allocate his time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. The portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

MASB-10-02 August 3, 2010
1.475751.121

The following table provides information relating to other accounts managed by Mr. Ramundo as of June 30, 2010:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	8	none	none
Number of Accounts Managed with Performance-Based Advisory Fees	none	none	none
Assets Managed (in millions)	$ 21,506	none	none
Assets Managed with Performance-Based Advisory Fees (in millions)	none	none	none

* Includes Fidelity Massachusetts Municipal Income Fund ($2,449 (in millions) assets managed).

As of June 30, 2010, the dollar range of shares of Fidelity Massachusetts Municipal Income Fund beneficially owned by Mr. Ramundo was none.