UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number			811-03326
Morgan Stanley U.S. Government Money Market Trust
(Exact name of registrant as specified in charter)
522 Fifth Avenue, New York, New York					10036
(Address of principal executive offices)					(Zip code)
Randy Takian 522 Fifth Avenue, New York, New York 10036
(Name and address of agent for service)
Registrant’s telephone number, including area code:				212-296-6990
Date of fiscal year end:	January 31, 2010
Date of reporting period:		January 31, 2010

Item 1 - Report to Shareholders

INVESTMENT MANAGEMENT

Welcome, Shareholder:

In this report, you'll learn about how your investment in Morgan Stanley U.S. Government Money Market Trust performed during the annual period. We will provide an overview of the market conditions, and discuss some of the factors that affected performance during the reporting period. In addition, this report includes the Fund's financial statements and a list of Fund investments.

This material must be preceded or accompanied by a prospectus for the fund being offered.

Market forecasts provided in this report may not necessarily come to pass. There is no assurance that a mutual fund will achieve its investment objective. An investment in a money market fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of an investment at $1.00 per share, it is possible to lose money by investing in the Fund. Please see the prospectus for more complete information on investment risks.

Fund Report

For the year ended January 31, 2010

Market Conditions

The financial markets began to recover in March 2009 as various programs enacted by the government to restore stability to the markets and the economy appeared to take hold. Although unemployment was still rising, other economic indicators were improving, indicating that perhaps the contraction in economic growth was slowing. At the same time, credit conditions became more favorable, thanks in part to the Federal Reserve's zero interest-rate policy and other initiatives to enhance liquidity. The market rally gained momentum and continued throughout the reporting period as investors were encouraged by positive news on the corporate and economic fronts.

As market conditions improved, the credit bellwether 3-month London Interbank Offer Rate ("LIBOR") moved progressively lower, ending the reporting period at 0.249 percent versus 1.18 percent one year earlier. The LIBOR/OIS spread (the differential between 3-month LIBOR and the overnight indexed swap rate) declined from 91 basis points at the end of January 2009 to 10 basis points by the end of January 2010. The decline in LIBOR levels and the LIBOR/OIS spread is indicative of improved financing conditions as the various government-sponsored programs globally have reinvigorated financing activities this year.

Although usage of the government-sponsored liquidity programs materially declined as the financial markets moved closer to normalcy, the Federal Reserve Board of Governors had extended a number of these programs through February 1, 2010 to promote further financial stability and support the flow of credit to households and businesses.

Performance Analysis

As of January 31, 2010, Morgan Stanley U.S. Government Money Market Trust had net assets of approximately $652 million and an average portfolio maturity of 32days. For the 12-month period ended January 31, 2010, the Fund provided a total return of 0.02 percent. For the seven-day period ended January 31, 2010, the Fund provided an effective annualized yield of 0.01percent (subsidized) and –0.58percent (non-subsidized) and a current yield of 0.01 percent (subsidized) and –0.58 percent (non-subsidized). Yield quotations more closely reflect the current earnings of the Fund. The non-subsidized yield reflects what the yield would have been had a fee and/or expense waiver not been in place during the period shown. Past performance is no guarantee of future results.

During the reporting period, we managed the Fund in a conservative manner, maintaining a high level of liquidity. We kept the portfolio's weighted average maturity relatively short in an effort to guard against the uncertainty caused by volatility in the financial markets. We invested cash in overnight maturities, mainly in repurchase agreements collateralized by U.S. government agencies, and in short-term U.S.agency debt, progressively extending out the yield curve as market conditions improved. The Fund's yields reflect the extremely low interest rate

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environment ushered in by the Federal Reserve and the high demand for short-term investments by the marketplace.

There is no guarantee that any sectors mentioned will continue to perform as discussed herein or that securities in such sectors will be held by the Fund in the future.

PORTFOLIO COMPOSITION as of 01/31/10
U.S. Government Agencies — Discount Notes	41.2	%
Repurchase Agreements	30.1
U.S. Government Agencies — Floating Rate Notes	14.0
U.S. Government Obligations	8.8
U.S. Government Agencies — Debenture Bonds	5.9
MATURITY SCHEDULE as of 01/31/10
1 - 30 Days	65.1	%
31 - 60 Days	13.6
61 - 90 Days	14.2
91 - 120 Days	2.3
121 + Days	4.8

Subject to change daily. Provided for informational purposes only and should not be deemed as a recommendation to buy or sell the securities mentioned above. Portfolio composition and maturity schedule are as a percentage of total investments. Morgan Stanley is a full-service securities firm engaged in securities trading and brokerage activities, investment banking, research and analysis, financing and financial advisory services.

Investment Strategy

The Fund will invest in high quality, short-term U.S. government securities. The Fund's "Investment Adviser," Morgan Stanley Investment Advisors Inc., seeks to maintain the Fund's share price at $1.00. The share price remaining stable at $1.00 means that the Fund would preserve the principal value of your investment.

An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund.

For More Information About Portfolio Holdings

Each Morgan Stanley fund provides a complete schedule of portfolio holdings in its semiannual and annual reports within 60 days of the end of the fund's second and fourth fiscal quarters. The semiannual reports and the annual reports are filed electronically with the Securities and Exchange Commission (SEC) on Form N-CSRS and Form N-CSR, respectively. Morgan Stanley also delivers the semiannual and annual reports to fund shareholders and makes these reports available on its public web site, www.morganstanley.com. Each Morgan Stanley fund also files a complete schedule of portfolio holdings with the SEC for the fund's first and third fiscal quarters on Form N-Q. Morgan Stanley does not deliver the reports for the first and third fiscal quarters to shareholders, nor are the reports posted to the Morgan Stanley public web site. You may, however, obtain the Form N-Q filings (as well as the Form N-CSR

3

and N-CSRS filings) by accessing the SEC's web site, http://www.sec.gov. You may also review and copy them at the SEC's public reference room in Washington, DC. Information on the operation of the SEC's public reference room may be obtained by calling the SEC at (800) SEC-0330. You can also request copies of these materials, upon payment of a duplicating fee, by electronic request at the SEC's e-mail address (publicinfo@sec.gov) or by writing the public reference section of the SEC, Washington, DC 20549-1520.

Householding Notice

To reduce printing and mailing costs, the Fund attempts to eliminate duplicate mailings to the same address. The Fund delivers a single copy of certain shareholder documents, including shareholder reports, prospectuses and proxy materials, to investors with the same last name who reside at the same address. Your participation in this program will continue for an unlimited period of time unless you instruct us otherwise. You can request multiple copies of these documents by calling (800) 869-NEWS, 8:00 a.m. to 8:00 p.m., ET. Once our Customer Service Center has received your instructions, we will begin sending individual copies for each account within 30 days.

4

Expense Example

As a shareholder of the Fund, you incur ongoing costs, including advisory fees; shareholder servicing fees; and other Fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period 08/01/09 – 01/31/10.

Actual Expenses

The first line of the table below provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The second line of the table below provides information about hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing cost of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only. Therefore, the second line of the table is useful in comparing ongoing costs, and will not help you determine the relative total cost of owning different funds that have transactional costs, such as sales charges (loads) or exchange fees.

	Beginning		Ending		Expenses Paid
	Account Value		Account Value		During Period@
	08/01/09		01/31/10		08/01/09 – 01/31/10
Actual (0.01% return)	$	1,000.00	$	1,000.10	$	1.10
Hypothetical (5% annual return before expenses)	$	1,000.00	$	1,023.83	$	1.11

  @  Expenses are equal to the Fund's annualized expense ratio of 0.22% multiplied by the average account value over the period, multiplied by 182^_@@/365 (to reflect the one-half year period). If the fund had borne all of its expenses, the annualized expense ratio would have been 0.73%. These figures reflect fees paid in connection with the U.S. Treasury Guarantee Program for Money Market Funds. This fee had an effect of 0.02%.

  @@  Adjusted to reflect non-business days accruals.

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Morgan Stanley U.S. Government Money Market Trust

Portfolio of Investments  nJanuary 31, 2010

PRINCIPAL AMOUNT IN THOUSANDS			ANNUALIZED YIELD ON DATE OF PURCHASE			MATURITY DATE	VALUE
		U.S. Government Agencies - Discount Notes (41.5%)
$	170,000	Federal Home Loan Banks		0.03 - 0.27	%	02/01/10 - 03/26/10	$	169,990,331
	49,785	Federal Home Loan Mortgage Corp.		0.11 - 0.16		03/05/10 - 05/04/10		49,771,140
	50,668	Federal National Mortgage Assoc.		0.10 - 0.46		03/01/10 - 06/01/10		50,643,908
		Total U.S. Government Agencies - Discount Notes(Cost $270,405,379)						270,405,379
		Repurchase Agreements (30.2%)
	87,320	Barclays Capital LLC, (dated 01/29/10; proceeds $87,320,800; fully collateralized by Federal Home Loan Mortgage Corp., 0.00% due 10/26/10; valued at $89,067,390)		0.11		02/01/10		87,320,000
	90,000	BNP Paribas Securities Corp., (dated 01/29/10; proceeds $90,000,900; fully collateralized by Federal National Mortgage Assoc., 1.74% - 6.68% due 02/01/11 - 08/01/42; Federal Home Loan Mortgage Corp., 4.32% due 08/01/39; valued at $92,700,000)		0.12		02/01/10		90,000,000
	10,000	Deutsche Bank Securities Corp., (dated 01/13/10; proceeds $10,000,408; fully collateralized by Federal National Mortgage Assoc., 7.00% due 08/01/38; valued at $10,300,000)		0.07		02/03/10		10,000,000
	10,000	Deutsche Bank Securities Corp., (dated 01/22/10; proceeds $10,000,583; fully collateralized by Federal National Mortgage Assoc., 7.00% due 10/01/38; valued at $10,300,000)		0.10		02/12/10		10,000,000
		Total Repurchase Agreements(Cost $197,320,000)						197,320,000
		U.S. Government Agencies - Floating Rate Notes (14.1%)
	10,000	Federal Farm Credit Banks		0.09	(a)	03/25/10(b)		9,999,145
	82,000	Federal Home Loan Banks		0.07 - 0.26	(a)	02/12/10 - 03/02/10(b)		81,984,375
		Total U.S. Government Agencies - Floating Rate Notes(Cost $91,983,520)						91,983,520
		U.S. Government Obligations (8.9%)
	48,000	U.S. Treasury Bills		0.11 - 0.40		02/25/10 - 08/26/10		47,970,751
	10,000	U.S. Treasury Note		0.28		03/31/10		10,024,035
		Total U.S. Government Obligations(Cost $57,994,786)						57,994,786

See Notes to Financial Statements
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Portfolio of Investments  nJanuary 31, 2010 continued

PRINCIPAL AMOUNT IN THOUSANDS			ANNUALIZED YIELD ON DATE OF PURCHASE			MATURITY DATE			VALUE
		U.S. Government Agencies - Debenture Bonds (5.9%)
$	20,000	Federal Home Loan Banks		0.15	%	03/12/10			$	20,058,662
	18,266	Federal National Mortgage Assoc.		0.03 - 0.24		02/10/10 - 08/15/10				18,525,298
		Total U.S. Government Agencies - Debenture Bonds(Cost $38,583,960)								38,583,960
		Total Investments(Cost $656,287,645) (c)					100.6	%		656,287,645
		Liabilities in Excess of Other Assets					(0.6	)		(4,064,129	)
		Net Assets					100.0	%	$	652,223,516

  (a)  Rate shown is the rate in effect at January 31, 2010.

  (b)  Date of next interest rate reset.

  (c)  Cost is the same for federal income tax purposes.

See Notes to Financial Statements
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Morgan Stanley U.S. Government Money Market Trust

Financial Statements

Statement of Assets and Liabilities

January 31, 2010

Assets:
Investments in securities, at value (cost $656,287,645, including repurchase agreements of $197,320,000)	$	656,287,645
Cash		103,067
Receivable for:
Shares of beneficial interest sold		4,689,767
Interest		602,985
Receivable from Adviser		24,854
Prepaid expenses and other assets		49,449
Total Assets		661,757,767
Liabilities:
Payable for:
Investments purchased		6,996,829
Shares of beneficial interest redeemed		2,309,554
Transfer agent fee		47,478
Accrued expenses and other payables		180,390
Total Liabilities		9,534,251
Net Assets	$	652,223,516
Composition of Net Assets:
Paid-in-capital	$	652,199,932
Accumulated undistributed net investment income		15,613
Accumulated undistributed net realized gain		7,971
Net Assets	$	652,223,516
Net Asset Value Per Share 652,264,844 shares outstanding (unlimited shares authorized of $.01 par value)	$	1.00

See Notes to Financial Statements
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Morgan Stanley U.S. Government Money Market Trust

Financial Statements continued

Statement of Operations

For the year ended January 31, 2010

Net Investment Income:
Interest Income	$	3,235,123
Expenses
Investment advisory fee		3,746,158
Shareholder servicing fee		864,543
Transfer agent fees and expenses		587,011
Administration fee		466,947
Mutual fund insurance (Note 10)		384,447
Shareholder reports and notices		129,663
Registration fees		105,226
Professional fees		79,898
Trustees' fees and expenses		43,746
Custodian fees		41,428
Other		100,285
Total Expenses		6,549,352
Less: amounts waived		(3,412,558	)
Net Expenses		3,136,794
Net Investment Income		98,329
Net Realized Gain		10,749
Net Increase	$	109,078

See Notes to Financial Statements
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Morgan Stanley U.S. Government Money Market Trust

Financial Statements continued

Statements of Changes in Net Assets

	FOR THE YEAR ENDED JANUARY 31, 2010			FOR THE YEAR ENDED JANUARY 31, 2009
Increase (Decrease) in Net Assets: Operations:
Net investment income	$	98,329		$	19,376,721
Net realized gain		10,749			32,972
Net Increase		109,078			19,409,693
Dividends and Distributions to Shareholders from:
Net investment income		(181,471	)		(19,344,981	)
Net realized gain		(1,959	)		(31,688	)
Total Dividends and Distributions		(183,430	)		(19,376,669	)
Net increase (decrease) from transactions in shares of beneficial interest		(994,523,221	)		726,951,166
Net Increase (Decrease)		(994,597,573	)		726,984,190
Net Assets:
Beginning of period		1,646,821,089			919,836,899
End of Period (Including accumulated undistributed net investment income of $15,613 and $99,410, respectively)	$	652,223,516		$	1,646,821,089

See Notes to Financial Statements
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Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010

1. Organization and Accounting Policies

Morgan Stanley U.S. Government Money Market Trust (the "Fund") is registered under the Investment Company Act of 1940, as amended (the "Act"), as a diversified, open-end management investment company. The Fund's investment objectives are security of principal, high current income and liquidity. The Fund was organized as a Massachusetts business trust on November 18, 1981 and commenced operations on February 17, 1982.

The following is a summary of significant accounting policies:

A. Valuation of Investments — Portfolio securities are valued at amortized cost, which approximates market value, in accordance with Rule 2a-7 under the Act.

B. Accounting for Investments — Security transactions are accounted for on the trade date (date the order to buy or sell is executed). Realized gains and losses on security transactions are determined by the identified cost method. Discounts are accreted and premiums are amortized over the life of the respective securities and are included in interest income. Interest income is accrued daily as earned.

C. Repurchase Agreements — The Fund may invest directly with institutions in repurchase agreements. The Fund's custodian receives the collateral, which is marked-to-market daily to determine that the value of the collateral does not decrease below the repurchase price plus accrued interest as earned. If such a decrease occurs, additional collateral will be requested and, when received, will be added to the account to maintain full collateralization.

D. Federal Income Tax Policy — It is the Fund's policy to comply with the requirements of Subchapter M of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. The Fund files tax returns with the U.S. Internal Revenue Service, New York State and New York City. The Fund recognizes the tax effects of a tax position taken or expected to be taken in a tax return only if it is more likely than not to be sustained based solely on its technical merits as of the reporting date. The more-likely-than-not threshold must continue to be met in each reporting period to support continued recognition of the benefit. The difference between the tax benefit recognized in the financial statements for a tax position taken and the tax benefit claimed in the income tax return is referred to as an unrecognized tax benefit. There are no unrecognized tax benefits in the accompanying financial statements. If applicable, the Fund recognizes interest accrued related to unrecognized tax benefits in interest expense and penalties in other expenses in the Statement of Operations. Each of the tax years filed in the four-year period ended January 31, 2010, remains subject to examination by taxing authorities.

E. Dividends and Distributions to Shareholders — The Fund records dividends and distributions to shareholders as of the close of each business day.

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Notes to Financial Statements  nJanuary 31, 2010 continued

F. Use of Estimates — The preparation of financial statements in accordance with generally accepted accounting principles in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts and disclosures. Actual results could differ from those estimates.

G. Subsequent Events — The Fund considers events or transactions that occur after the date of the Statement of Assets and Liabilities but before the financial statements are issued to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated through the date of issuance of these financial statements.

2. Fair Valuation Measurements

Fair value is defined as the price that the Fund would receive to sell an investment or pay to transfer a liability in a timely transaction with an independent buyer in the principal market, or in the absence of a principal market the most advantageous market for the investment or liability. GAAP utilizes a three-tier hierarchy to distinguish between (1) inputs that reflect the assumptions market participants would use in pricing an asset or liability developed based on market data obtained from sources independent of the reporting entity (observable inputs) and (2) inputs that reflect the reporting entity's own assumptions about the assumptions market participants would use in pricing an asset or liability developed based on the best information available in the circumstances (unobservable inputs) and to establish classification of fair value measurements for disclosure purposes. Various inputs are used in determining the value of the Fund's investments. The inputs are summarized in the three broad levels listed below.

•  Level 1 — unadjusted quoted prices in active markets for identical investments

•  Level 2 — other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

•  Level 3 — significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments)

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities and the determination of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to each security.

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Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010 continued

The following is the summary of the inputs used as of January 31, 2010 in valuing the Fund's investments carried at fair value:

			FAIR VALUE MEASUREMENTS AT JANUARY 31, 2010 USING
INVESTMENT TYPE	TOTAL		UNADJUSTED QUOTED PRICES IN ACTIVE MARKET FOR IDENTICAL INVESTMENTS (LEVEL 1)		OTHER SIGNIFICANT OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Short-Term Investments
U.S. Government Agencies — Discount Notes	$	270,405,379		—	$	270,405,379		—
Repurchase Agreements		197,320,000		—		197,320,000		—
U.S. Government Agencies — Floating Rate Notes		91,983,520		—		91,983,520		—
U.S. Government Obligations		57,994,786		—		57,994,786		—
U.S. Government Agencies — Debenture Bonds		38,583,960		—		38,583,960		—
Total	$	656,287,645		—	$	656,287,645		—

3. Investment Advisory/Administration Agreements

Pursuant to an Investment Advisory Agreement with Morgan Stanley Investment Advisors Inc. (the "Investment Adviser"), the Fund pays the Investment Adviser an advisory fee, accrued daily and payable monthly, by applying the following annual rates to the net assets of the Fund determined as of the close of each business day: 0.45% to the portion of the daily net assets not exceeding $500 million; 0.375% to the portion of the daily net assets exceeding $500 million but not exceeding $750 million; 0.325% to the portion of the daily net assets exceeding $750 million but not exceeding $1 billion; 0.30% to the portion of the daily net assets exceeding $1 billion but not exceeding $1.5 billion; 0.275% to the portion of the daily net assets exceeding $1.5 billion but not exceeding $2 billion; 0.25% to the portion of the daily net assets exceeding $2 billion but not exceeding $2.5 billion; 0.225% to the portion of the daily net assets exceeding $2.5 billion but not exceeding $3 billion; and 0.20% to the portion of the daily net assets exceeding $3 billion.

Pursuant to an Administration Agreement with Morgan Stanley Services Company Inc. (the "Administrator"), an affiliate of the Investment Adviser, the Fund pays an administration fee, accrued daily and payable monthly, by applying the annual rate of 0.05% to the Fund's daily net assets.

Under an agreement between the Administrator and State Street Bank and Trust Company ("State Street"), State Street provides certain administrative services to the Fund. For such services, the Administrator pays State Street a portion of the fee the Administrator receives from the Fund.

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Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010 continued

The Investment Adviser has voluntarily agreed to cap the Fund's operating expenses through June 30, 2010, (excluding fees paid in connection with the U.S. Treasury's Temporary Guarantee Program for Money Market Funds) by assuming the Fund's "other expenses" and/or waiving the Fund's advisory fees, and the Administrator has agreed to waive the Fund's administrative fees, to the extent that such operating expenses exceed 0.75% of the daily net assets of the Fund on an annualized basis.

4. Shareholder Service Plan

Pursuant to a Shareholder Service Plan (the "Plan"), the Fund may pay Morgan Stanley Distributors Inc. (the "Distributor") as compensation for the provision of services to shareholders a service fee up to the rate of 0.15% on an annualized basis of the average daily net assets of the Fund.

Reimbursements for these expenses are made in monthly payments by the Fund to the Distributor, which will in no event exceed an amount equal to a payment at the annual rate of 0.15% of the Fund's average daily net assets during the month. Expenses incurred by the Distributor pursuant to the Plan in any fiscal year will not be reimbursed by the Fund through payments accrued in any subsequent fiscal year. For the year ended January 31, 2010, the shareholder servicing fee was accrued at the annual rate of 0.09%.

The Distributor, Investment Adviser and Administrator have voluntarily agreed to waive all or a portion of the Fund's shareholder service fee, investment advisory fee and administration fee, respectively, to the extent that total expenses exceed total income of the Fund on a daily basis. For the year ended January 31, 2010, the Distributor waived $933,894, the Investment Adviser waived $2,424,117 and the Administrator waived $54,547. This waiver may be terminated at any time.

5. Security Transactions and Transactions with Affiliates

The cost of purchases and proceeds from sales/maturities of portfolio securities for the year ended January 31, 2010 aggregated $97,561,459,037 and $98,494,427,164, respectively.

Morgan Stanley Trust, an affiliate of the Investment Adviser, Administrator and Distributor, is the Fund's transfer agent.

The Fund has an unfunded noncontributory defined benefit pension plan covering certain independent Trustees of the Fund who will have served as independent Trustees for at least five years at the time of retirement. Benefits under this plan are based on factors which include years of service and compensation. The Trustees voted to close the plan to new participants and eliminate the future benefits growth due to increases to compensation after July 31, 2003. Aggregate pension costs for the year ended January 31, 2010, included in "trustees' fees and expenses" in the Statement of Operations amounted to $13,139. At January 31, 2010, the Fund had an accrued pension liability of

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Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010 continued

$65,172, which is included in "accrued expenses and other payables" in the Statement of Assets and Liabilities.

The Fund has an unfunded Deferred Compensation Plan (the "Compensation Plan") which allows each independent Trustee to defer payment of all, or a portion, of the fees he or she receives for serving on the Board of Trustees. Each eligible Trustee generally may elect to have the deferred amounts credited with a return equal to the total return on one or more of the Morgan Stanley funds that are offered as investment options under the Compensation Plan. Appreciation/depreciation and distributions received from these investments are recorded with an offsetting increase/decrease in the deferred compensation obligation and do not affect the net asset value of the Fund.

6. Shares of Beneficial Interest

Transactions in shares of beneficial interest, at $1.00 per share, were as follows:

	FOR THE YEAR ENDED JANUARY 31, 2010			FOR THE YEAR ENDED JANUARY 31, 2009
Shares sold		431,186,615			4,071,990,363
Shares issued in reinvestment of dividends and distributions		183,392			19,236,531
		431,370,007			4,091,226,894
Shares redeemed		(1,425,893,228	)		(3,364,275,728	)
Net increase (decrease) in shares outstanding		(994,523,221	)		726,951,166

7. Expense Offset

The expense offset represents a reduction of the fees and expenses for interest earned on cash balances maintained by the Fund with the transfer agent and custodian. For the year ended January 31, 2010, the Fund did not have an expense offset.

8. Risks Relating to Certain Financial Instruments

The Fund may invest in, or receive as collateral for repurchase agreements, securities issued by Federal National Mortgage Association ("FNMA") and Federal Home Loan Mortgage Corporation ("FHLMC"). Securities issued by FNMA and FHLMC are not backed by or entitled to the full faith and credit of the United States; rather, they are supported by the right of the issuer to borrow from the Treasury.

The Federal Housing Finance Agency ("FHFA") serves as conservator of FNMA and FHLMC and the U.S. Department of the Treasury has agreed to provide capital as needed to ensure FNMA and FHLMC continue to provide liquidity to the housing and mortgage markets.

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Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010 continued

9. Federal Income Tax Status

The amount of dividends and distributions from net investment income and net realized capital gains are determined in accordance with federal income tax regulations which may differ from GAAP. These "book/tax" differences are either considered temporary or permanent in nature. To the extent these differences are permanent in nature, such amounts are reclassified within the capital accounts based on their federal tax-basis treatment; temporary differences do not require reclassification. Dividends and distributions which exceed net investment income and net realized capital gains for tax purposes are reported as distributions of paid-in-capital.

The tax character of distributions paid was as follows:

	FOR THE YEAR ENDED JANUARY 31, 2010			FOR THE YEAR ENDED JANUARY 31, 2009
Ordinary income	$	183,430		$	19,376,219
Long-term capital gains		—			450
Total distributions	$	183,430		$	19,376,669
As of January 31, 2010, the tax-basis components of accumulated earnings were as follows:
Undistributed ordinary income	$	84,589
Undistributed long-term gains		7,971
Net accumulated earnings		92,560
Temporary differences		(68,976	)
Net unrealized appreciation		—
Total accumulated earnings	$	23,584

As of January 31, 2010, the Fund had temporary book/tax differences attributable to nondeductible expenses.

Permanent differences, due to nondeductible expenses, resulted in the following reclassifications among the Fund's components of net assets at January 31, 2010:

ACCUMULATED UNDISTRIBUTED NET INVESTMENT INCOME			ACCUMULATED UNDISTRIBUTED NET REALIZED GAIN		PAID-IN-CAPITAL
$	(655	)	$	655		—

16

Morgan Stanley U.S. Government Money Market Trust

Notes to Financial Statements  nJanuary 31, 2010 continued

10. Guarantee Program for Money Market Funds

On September 29, 2008, the Trustees approved the participation by the Fund in the U.S. Treasury's Temporary Guarantee Program for Money Market Funds (the "Program"). Under this Program, the U.S. Treasury guaranteed investors of participating money market funds that they would receive $1.00 for each money market fund share held as of close of business on September 19, 2008.

Each money market fund paid a fee in order to participate in the Program. The Program went into effect for an initial three month term and was subsequently extended by the U.S. Treasury through September 18, 2009.

11. New Accounting Pronouncement

On January 21, 2010, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2010-06. The ASU amends Accounting Standards Codification 820 to add new requirements for disclosures about transfers into and out of Levels 1 and 2 and separate disclosures about purchases, sales, issuances, and settlements relating to Level 3 measurements. It also clarifies existing fair value disclosures about the level of disaggregation and about inputs and valuation techniques in Level 2 and Level 3 fair value measurements. The application of ASU 2010-06 is required for fiscal years and interim periods beginning after December 15, 2009, except for disclosures about purchases, sales, issuances, and settlements relating to Level 3 measurements, which are required for fiscal years beginning after December 15, 2010 and for interim periods within those fiscal years. At this time, the Fund's management is evaluating the implications of ASU 2010-06 on the Fund's financial statements.

17

Morgan Stanley U.S. Government Money Market Trust

Financial Highlights

Selected ratios and per share data for a share of beneficial interest outstanding throughout each period:

	FOR THE YEAR ENDED JANUARY 31,
	2010			2009			2008			2007			2006
Selected Per Share Data:
Net asset value, beginning of period	$	1.00		$	1.00		$	1.00		$	1.00		$	1.00
Net income from investment operations		0.000	(1)		0.015			0.044			0.044			0.027
Less dividends and distributions from net investment income		(0.000	)  (1)(2)		(0.015	)  (2)		(0.044	)(2)		(0.044	)  (2)		(0.027	)
Net asset value, end of period	$	1.00		$	1.00		$	1.00		$	1.00		$	1.00
Total Return		0.02	%		1.54	%		4.50	%		4.49	%		2.71	%
Ratios to Average Net Assets:
Total expenses (before expense offset)		0.34	%(3)(4)		0.61	%(3)(4)		0.75	%		0.74	%(4)		0.75	%(4)
Net investment income		0.01	%(3)(4)		1.37	%(3)(4)		4.36	%		4.36	%(4)		2.62	%(4)
Supplemental Data:
Net assets, end of period, in millions	$	652		$	1,647		$	920		$	779		$	938

(1)  Amount is less than $0.001.

(2)  Includes capital gain distribution of less than $0.001.

(3)  Reflects fees paid in connection with the U.S. Treasury's Temporary Guarantee Program for Money Market Funds. This fee had an effect of 0.04% and 0.02% for the years ended 2010 and 2009, respectively (see Note 10).

(4)  If the Fund had borne all expenses that were reimbursed or waived by the Distributor, Investment Adviser and Administrator, the annualized expense and net investment income (loss) ratios, before expense offset, would have been as follows:

PERIOD ENDED	EXPENSE RATIO			NET INVESTMENT INCOME (LOSS) RATIO
January 31, 2010		0.70	%		(0.35	)%
January 31, 2009		0.62			1.36
January 31, 2007		0.80			4.30
January 31, 2006		0.76			2.60

See Notes to Financial Statements
18

Morgan Stanley U.S. Government Money Market Trust

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Trustees of
Morgan Stanley U.S. Government Money Market Trust:

We have audited the accompanying statement of assets and liabilities of Morgan Stanley U.S. Government Money Market Trust (the "Fund"), including the portfolio of investments, as of January 31, 2010, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of January 31, 2010, by correspondence with the custodian and brokers; where replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Morgan Stanley U.S. Government Money Market Trust as of January 31, 2010, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America.

Deloitte & Touche LLP
New York, New YorkMarch 25, 2010

19

Morgan Stanley U.S. Government Money Market Trust

An Important Notice Concerning Our U.S. Privacy Policy (unaudited)

We are required by federal law to provide you with a copy of our privacy policy ("Policy") annually.

This Policy applies to current and former individual clients of Morgan Stanley Distributors Inc., as well as current and former individual investors in Morgan Stanley mutual funds and related companies.

This Policy is not applicable to partnerships, corporations, trusts or other non-individual clients or account holders, nor is this Policy applicable to individuals who are either beneficiaries of a trust for which we serve as trustee or participants in an employee benefit plan administered or advised by us. This Policy is, however, applicable to individuals who select us to be a custodian of securities or assets in individual retirement accounts, 401(k) accounts, 529 Educational Savings Accounts, accounts subject to the Uniform Gifts to Minors Act, or similar accounts. We may amend this Policy at any time, and will inform you of any changes to this Policy as required by law.

We Respect Your Privacy

We appreciate that you have provided us with your personal financial information and understand your concerns about safeguarding such information. We strive to maintain the privacy of such information while we help you achieve your financial objectives. This Policy describes what non-public personal information we collect about you, how we collect it, when we may share it with others, and how others may use it. It discusses the steps you may take to limit our sharing of information about you with affiliated Morgan Stanley companies ("affiliated companies"). It also discloses how you may limit our affiliates' use of shared information for marketing purposes. Throughout this Policy, we refer to the non-public information that personally identifies you or your accounts as "personal information."

1. What Personal Information Do We Collect About You?

To better serve you and manage our business, it is important that we collect and maintain accurate information about you. We obtain this information from applications and other forms you submit to us, from your dealings with us, from consumer reporting agencies, from our websites and from third parties and other sources.

For example:

•  We collect information such as your name, address, e-mail address, telephone/fax numbers, assets, income and investment objectives through application forms you submit to us.

•  We may obtain information about account balances, your use of account(s) and the types of products and services you prefer to receive from us through your dealings and transactions with us and other sources.

•  We may obtain information about your creditworthiness and credit history from consumer reporting agencies.

20

Morgan Stanley U.S. Government Money Market Trust

An Important Notice Concerning Our U.S. Privacy Policy (unaudited) continued

•  We may collect background information from and through third-party vendors to verify representations you have made and to comply with various regulatory requirements.

•  If you interact with us through our public and private Web sites, we may collect information that you provide directly through online communications (such as an e-mail address). We may also collect information about your Internet service provider, your domain name, your computer's operating system and Web browser, your use of our Web sites and your product and service preferences, through the use of "cookies." "Cookies" recognize your computer each time you return to one of our sites, and help to improve our sites' content and personalize your experience on our sites by, for example, suggesting offerings that may interest you. Please consult the Terms of Use of these sites for more details on our use of cookies.

2. When Do We Disclose Personal Information We Collect About You?

To provide you with the products and services you request, to better serve you, to manage our business and as otherwise required or permitted by law, we may disclose personal information we collect about you to other affiliated companies and to non-affiliated third parties.

A. Information We Disclose to Our Affiliated Companies. In order to manage your account(s) effectively, including servicing and processing your transactions, to let you know about products and services offered by us and affiliated companies, to manage our business, and as otherwise required or permitted by law, we may disclose personal information about you to other affiliated companies. Offers for products and services from affiliated companies are developed under conditions designed to safeguard your personal information.

B. Information We Disclose to Third Parties. We do not disclose personal information that we collect about you to non-affiliated third parties except to enable them to provide marketing services on our behalf, to perform joint marketing agreements with other financial institutions, and as otherwise required or permitted by law. For example, some instances where we may disclose information about you to third parties include: for servicing and processing transactions, to offer our own products and services, to protect against fraud, for institutional risk control, to respond to judicial process or to perform services on our behalf. When we share personal information with a non-affiliated third party, they are required to limit their use of personal information about you to the particular purpose for which it was shared and they are not allowed to share personal information about you with others except to fulfill that limited purpose or as may be required by law.

3. How Do We Protect the Security and Confidentiality of Personal Information We Collect About You?

We maintain physical, electronic and procedural security measures to help safeguard the personal information we collect about you. We have internal policies governing the proper handling of client

21

Morgan Stanley U.S. Government Money Market Trust

An Important Notice Concerning Our U.S. Privacy Policy (unaudited) continued

information. Third parties that provide support or marketing services on our behalf may also receive personal information about you, and we require them to adhere to confidentiality standards with respect to such information.

4. How Can You Limit Our Sharing of Certain Personal Information About You With Our Affiliated Companies for Eligibility Determination?

We respect your privacy and offer you choices as to whether we share with our affiliated companies personal information that was collected to determine your eligibility for products and services such as credit reports and other information that you have provided to us or that we may obtain from third parties ("eligibility information"). Please note that, even if you direct us not to share certain eligibility information with our affiliated companies, we may still share your personal information, including eligibility information, with those companies under circumstances that are permitted under applicable law, such as to process transactions or to service your account. We may also share certain other types of personal information with affiliated companies — such as your name, address, telephone number, e-mail address and account number(s), and information about your transactions and experiences with us.

5. How Can You Limit the Use of Certain Personal Information About You by our Affiliated Companies for Marketing?

You may limit our affiliated companies from using certain personal information about you that we may share with them for marketing their products or services to you. This information includes our transactions and other experiences with you such as your assets and account history. Please note that, even if you choose to limit our affiliated companies from using certain personal information about you that we may share with them for marketing their products and services to you, we may still share such personal information about you with them, including our transactions and experiences with you, for other purposes as permitted under applicable law.

6. How Can You Send Us an Opt-Out Instruction?

If you wish to limit our sharing of certain personal information about you with our affiliated companies for "eligibility purposes" and for our affiliated companies' use in marketing products and services to you as described in this notice, you may do so by:

•  Calling us at (800) 869-6397
Monday–Friday between 8a.m. and 8p.m. (EST)

•  Writing to us at the following address:
Morgan Stanley Privacy Department
Harborside Financial Center, Plaza Two, 3rd Floor
Jersey City, NJ 07311

22

Morgan Stanley U.S. Government Money Market Trust

An Important Notice Concerning Our U.S. Privacy Policy (unaudited) continued

If you choose to write to us, your written request should include: your name, address, telephone number and account number(s) to which the opt-out applies and should not be sent with any other correspondence. In order to process your request, we require that the request be provided by you directly and not through a third party. Once you have informed us about your privacy preferences, your opt-out preference will remain in effect with respect to this Policy (as it may be amended) until you notify us otherwise. If you are a joint account owner, we will accept instructions from any one of you and apply those instructions to the entire account. Please allow approximately 30 days from our receipt of your opt-out for your instructions to become effective.

Please understand that if you opt-out, you and any joint account holders may not receive certain Morgan Stanley or our affiliated companies' products and services that could help you manage your financial resources and achieve your investment objectives.

If you have more than one account with us or our affiliates, you may receive multiple privacy policies from us, and would need to follow the directions stated in each particular policy for each account you have with us.

Special Notice to Residents of Vermont
This section supplements our Policy with respect to our individual clients who have a Vermont address and supersedes anything to the contrary in the above Policy with respect to those clients only.

The State of Vermont requires financial institutions to obtain your consent prior to sharing personal information that they collect about you with affiliated companies and non-affiliated third parties other than in certain limited circumstances. Except as permitted by law, we will not share personal information we collect about you with non-affiliated third parties or other affiliated companies unless you provide us with your written consent to share such information ("opt-in").

If you wish to receive offers for investment products and services offered by or through other affiliated companies, please notify us in writing at the following address:

Morgan Stanley Privacy Department
Harborside Financial Center, Plaza Two, 3rd Floor
Jersey City, NJ 07311

Your authorization should include: your name, address, telephone number and account number(s) to which the opt-in applies and should not be sent with any other correspondence. In order to process your authorization, we require that the authorization be provided by you directly and not through a third-party.

23

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited)

Independent Trustees:

Name, Age and Address of Independent Trustee	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Independent Trustee**		Other Directorships Held by Independent Trustee***
Frank L. Bowman (65) c/o Kramer Levin Naftalis & Frankel LLP Counsel to the Independent Trustees 1177 Avenue of the Americas New York, NY 10036	Trustee	Since August 2006	President, Stategic Decisions, LLC (consulting) (since February 2009); Director or Trustee of various Retail Funds and Institutional Funds (since August 2006); Chairperson of the Insurance Sub-Committee of the Compliance and Insurance Committee (since February 2007); served as President and Chief Executive Officer of the Nuclear Energy Institute (policy organization) through November 2008; retired as Admiral, U.S. Navy in January 2005 after serving over 8 years as Director of the Naval Nuclear Propulsion Program and Deputy Administrator — Naval Reactors in the National Nuclear Security Administration at the U.S. Department of Energy (1996-2004), Knighted as Honorary Knight Commander of the Most Excellent Order of the British Empire; Awarded the Officer de l'Orde National du Mérite by the French Government.		162	Director of the Armed Services YMCA of the USA; member, BP America External Advisory Council (energy); member, National Academy of Engineers.
Michael Bozic (69) c/o Kramer Levin Naftalis & Frankel LLP Counsel to the Independent Trustees 1177 Avenue of the Americas New York, NY 10036	Trustee	Since April 1994	Private investor; Chairperson of the Compliance and Insurance Committee (since October 2006); Director or Trustee of the Retail Funds (since April 1994) and Institutional Funds (since July 2003); formerly, Chairperson of the Insurance Committee (July 2006-September 2006); Vice Chairman of Kmart Corporation (December 1998-October 2000), Chairman and Chief Executive Officer of Levitz Furniture Corporation (November 1995-November 1998) and President and Chief Executive Officer of Hills Department Stores (May 1991-July 1995); variously Chairman, Chief Executive Officer, President and Chief Operating Officer (1987-1991) of the Sears Merchandise Group of Sears, Roebuck & Co.		164	Director of various business organizations.

24

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited) continued

Name, Age and Address of Independent Trustee	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Independent Trustee**		Other Directorships Held by Independent Trustee***
Kathleen A. Dennis (56) c/o Kramer Levin Naftalis & Frankel LLP Counsel to the Independent Trustees 1177 Avenue of the Americas New York, NY 10036	Trustee	Since August 2006	President, Cedarwood Associates (mutual fund and investment management consulting) (since July 2006); Chairperson of the Money Market and Alternatives Sub-Committee of the Investment Committee (since October 2006) and Director or Trustee of various Retail Funds and Institutional Funds (since August 2006); formerly, Senior Managing Director of Victory Capital Management (1993-2006).		162	Director of various non-profit organizations.
Dr. Manuel H. Johnson (60) c/o Johnson Smick Group, Inc. 888 16th Street, N.W. Suite 740 Washington, D.C. 20006	Trustee	Since July 1991	Senior Partner, Johnson Smick International, Inc. (consulting firm); Chairperson of the Investment Committee (since October 2006) and Director or Trustee of the Retail Funds (since July 1991) and Institutional Funds (since July 2003); Co-Chairman and a founder of the Group of Seven Council (G7C) (international economic commission); formerly, Chairperson of the Audit Committee (July 1991-September 2006); Vice Chairman of the Board of Governors of the Federal Reserve System and Assistant Secretary of the U.S. Treasury.		164	Director of NVR, Inc. (home construction); Director of Evergreen Energy; Director of Greenwich Capital Holdings.
Joseph J. Kearns (67) c/o Kearns & Associates LLC PMB754 23852 Pacific Coast Highway Malibu, CA 90265	Trustee	Since August 1994	President, Kearns & Associates LLC (investment consulting); Chairperson of the Audit Committee (since October 2006) and Director or Trustee of the Retail Funds (since July 2003) and Institutional Funds (since August 1994); formerly, Deputy Chairperson of the Audit Committee (July 2003-September 2006) and Chairperson of the Audit Committee of the Institutional Funds (October 2001-July 2003); CFO of the J. Paul Getty Trust.		165	Director of Electro Rent Corporation (equipment leasing) and The Ford Family Foundation.

25

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited) continued

Name, Age and Address of Independent Trustee	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Independent Trustee**		Other Directorships Held by Independent Trustee***
Michael F. Klein (51) c/o Kramer Levin Naftalis & Frankel LLP Counsel to the Independent Trustees 1177 Avenue of the Americas New York, NY 10036	Trustee	Since August 2006	Managing Director, Aetos Capital, LLC (since March 2000) and Co-President, Aetos Alternatives Management, LLC (since January 2004); Chairperson of the Fixed Income Sub-Committee of the Investment Committee (since October 2006) and Director or Trustee of various Retail Funds and Institutional Funds (since August 2006); formerly, Managing Director, Morgan Stanley & Co. Inc. and Morgan Stanley Dean Witter Investment Management, President, Morgan Stanley Institutional Funds (June 1998-March 2000) and Principal, Morgan Stanley & Co. Inc. and Morgan Stanley Dean Witter Investment Management (August 1997-December 1999).		162	Director of certain investment funds managed or sponsored by Aetos Capital, LLC. Director of Sanitized AG and Sanitized Marketing AG (specialty chemicals).
Michael E. Nugent (73) c/o Triumph Capital, L.P. 445 Park Avenue New York, NY 10022	Chairperson of the Board and Trustee	Chairperson of the Boards since July 2006 and Trustee since July 1991	General Partner, Triumph Capital, L.P. (private investment partnership); Chairperson of the Boards of the Retail Funds and Institutional Funds (since July 2006); Director or Trustee of the Retail Funds (since July 1991) and Institutional Funds (since July 2001); formerly, Chairperson of the Insurance Committee (until July 2006).		164	None.

26

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited) continued

Name, Age and Address of Independent Trustee	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Independent Trustee**		Other Directorships Held by Independent Trustee***
W. Allen Reed (62)† c/o Kramer Levin Naftalis & Frankel LLP Counsel to the Independent Trustees 1177 Avenue of the Americas New York, NY 10036	Trustee	Since August 2006	Chairperson of the Equity Sub-Committee of the Investment Committee (since October 2006) and Director or Trustee of various Retail Funds and Institutional Funds (since August 2006); formerly, President and CEO of General Motors Asset Management; Chairman and Chief Executive Officer of the GM Trust Bank and Corporate Vice President of General Motors Corporation (August 1994-December 2005).		162	Director of Temple-Inland Industries (packaging and forest products); Director of Legg Mason, Inc. and Director of the Auburn University Foundation; formerly, Director of iShares, Inc. (2001-2006).
Fergus Reid (77) c/o Joe Pietryka, Inc. 85 Charles Colman Blvd. Pawling, NY 12564	Trustee	Since June 1992	Chairman, Joe Pietryka, Inc.; Chairperson of the Governance Committee and Director or Trustee of the Retail Funds (since July 2003) and Institutional Funds (since June 1992).		165	Trustee and Director of certain investment companies in the JPMorgan Funds complex managed by JP Morgan Investment Management Inc.

Interested Trustee:

Name, Age and Address of Interested Trustee	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Interested Trustee**		Other Directorships Held by Interested Trustee***
James F. Higgins (62) c/o Morgan Stanley Trust Harborside Financial Center Plaza Two Jersey City, NJ 07311	Trustee	Since June 2000	Director or Trustee of the Retail Funds (since June 2000) and Institutional Funds (since July 2003); Senior Advisor of Morgan Stanley (since August 2000).		163	Director of AXA Financial, Inc. and TheEquitable Life Assurance Society of the United States (financial services).

*  This is the earliest date the Trustee began serving the funds advised by Morgan Stanley Investment Advisors Inc. (the "Investment Adviser") (the "Retail Funds") or the funds advised by Morgan Stanley Investment Management Inc. and Morgan Stanley AIP GP LP (the "Institutional Funds").

**  The Fund Complex includes all open-end and closed-end funds (including all of their portfolios) advised by the Investment Adviser and any funds that have an investment adviser that is an affiliated person of the Investment Adviser (including, but not limited to, Morgan Stanley Investment Management Inc.).

  ***  This includes any directorships at public companies and registered investment companies held by the Trustee at any time during the past five years.

†  For the period September 26, 2008 through February 5, 2009, W. Allen Reed was an Interested Trustee. At all other times covered by this report, Mr. Reed was an Independent Trustee.

27

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited) continued

Executive Officers:

Name, Age and Address of Executive Officer	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years
Randy Takian (35) 522 Fifth Avenue New York, NY 10036	President and Principal Executive Officer	Since September 2008	President and Principal Executive Officer (since September 2008) of funds in the Fund Complex; President and Chief Executive Officer of Morgan Stanley Services Company Inc. (since September 2008). President of the Investment Adviser (since July 2008). Managing Director and Head of Americas distribution, Product and Marketing for Morgan Stanley Investment Management (since July 2008). Head of Liquidity and Bank Trust business (since July 2008) and the Latin American franchise (since July 2008) at Morgan Stanley Investment Management. Managing Director, Director and/or Officer of the Investment Adviser and various entities affiliated with the Investment Adviser. Formerly, Head of Retail and Intermediary Business, Head of Strategy and Product Development for the Alternatives Group and Senior Loan Investment Management. Formerly with Bank of America (July 1996-March 2006), most recently as Head of the Strategy, Mergers and Acquisitions team for Global Wealth and Investment Management.
Kevin Klingert (47) 522 Fifth Avenue New York, NY 10036	Vice President	Since June 2008	Head, Chief Operating Officer and acting Chief Investment Officer of the Global Fixed Income Group of Morgan Stanley Investment Management Inc. and the Investment Adviser (since April 2008). Head of Global Liquidity Portfolio Management and co-Head of Liquidity Credit Research of Morgan Stanley Investment Management (since December 2007). Managing Director of Morgan Stanley Investment Management Inc. and the Investment Adviser (since December 2007). Previously, Managing Director on the Management Committee and head of Municipal Portfolio Management and Liquidity at BlackRock (October 1991 to January 2007).
Carsten Otto (46) 522 Fifth Avenue New York, NY 10036	Chief Compliance Officer	Since October 2004	Managing Director and Global Head of Compliance for Morgan Stanley Investment Management (since April 2007) and Chief Compliance Officer of the Retail Funds and Institutional Funds (since October 2004). Formerly, U.S. Director of Compliance (October 2004-April 2007) and Assistant Secretary and Assistant General Counsel of the Retail Funds.
Stefanie V. Chang Yu (43) 522 Fifth Avenue New York, NY 10036	Vice President	Since December 1997	Managing Director and Secretary of the Investment Adviser and various entities affiliated with the Investment Adviser; Vice President of the Retail Funds (since July 2002) and Institutional Funds (since December 1997).

28

Morgan Stanley U.S. Government Money Market Trust

Trustee and Officer Information (unaudited) continued

Name, Age and Address of Executive Officer	Position(s) Held with Registrant	Term of Office and Length of Time Served*	Principal Occupation(s) During Past 5 Years
Francis J. Smith (44) c/o Morgan Stanley Trust Harborside Financial Center, Plaza Two, Jersey City, NJ 07311	Treasurer and Chief Financial Officer	Treasurer since July 2003 and Chief Financial Officer since September 2002	Executive Director of the Investment Adviser and various entities affiliated with the Investment Adviser; Treasurer and Chief Financial Officer of the Retail Funds (since July 2003) and the Institutional Funds (since March 2010).
Mary E. Mullin (43) 522 Fifth Avenue New York, NY 10036	Secretary	Since June 1999	Executive Director of the Investment Adviser and various entities affiliated with the Investment Adviser; Secretary of the Retail Funds (since July 2003) and Institutional Funds (since June 1999).

  *  This is the earliest date the Officer began serving the Retail Funds or Institutional Funds.

2010 Federal Tax Notice (Unaudited)
For Federal income tax purposes, the following information is furnished with respect to the distributions paid by the Fund during its taxable year ended January 31, 2010. 56.17% of the Fund's dividends was attributable to qualifying U.S. Government obligations. (Please consult your tax advisor to determine if any portion of the dividends you received is exempt from state income tax.)
For Federal income tax purposes, the following information is furnished with respect to the Fund's earnings for its taxable year ended January 31, 2010. For non-U.S. residents, the Fund may designate up to a maximum of $1,959 as qualifying as short-term capital gain dividends.
In January, the Fund provides tax information to shareholders for the preceding calendar year.

29

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Trustees

Frank L. Bowman
Michael Bozic
Kathleen A. Dennis
James F. Higgins
Dr. Manuel H. Johnson
Joseph J. Kearns
Michael F. Klein
Michael E. Nugent
W. Allen Reed
Fergus Reid

Officers

Michael E. Nugent
Chairperson of the Board

Randy Takian
President and Principal Executive Officer

Kevin Klingert
Vice President

Carsten Otto
Chief Compliance Officer

Stefanie V. Chang Yu
Vice President

Francis J. Smith
Treasurer and Chief Financial Officer

Mary E. Mullin
Secretary

Transfer Agent

Morgan Stanley Trust
Harborside Financial Center, Plaza Two
Jersey City, New Jersey 07311

Independent Registered Public Accounting Firm

Deloitte & Touche LLP
Two World Financial Center
New York, New York 10281

Legal Counsel

Dechert LLP
1095 Avenue of the Americas
New York, New York 10036

Counsel to the Independent Trustees

Kramer Levin Naftalis & Frankel LLP
1177 Avenue of the Americas
New York, New York 10036

Investment Adviser

Morgan Stanley Investment Advisors Inc.
522 Fifth Avenue
New York, New York 10036

This report is submitted for the general information of the shareholders of the Fund. For more detailed information about the Fund, its fees and expenses and other pertinent information, please read its Prospectus. The Fund's Statement of Additional Information contains additional information about the Fund, including its trustees. It is available, without charge, by calling (800) 869-NEWS.

This report is not authorized for distribution to prospective investors in the Fund unless preceded or accompanied by an effective Prospectus. Read the Prospectus carefully before investing.

Morgan Stanley Distributors Inc., member FINRA.

© 2010 Morgan Stanley

DWGANN
IU10-01206P-Y03/10

INVESTMENT MANAGEMENT

Morgan Stanley
U.S. Government
Money Market Trust

Annual Report

January 31, 2010

Item 2.  Code of Ethics.

(a)The Fund has adopted a code of ethics (the “Code of Ethics”) that applies to its principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the Fund or a third party.

(b)No information need be disclosed pursuant to this paragraph.

(c)Not applicable.

(d)Not applicable.

(e)Not applicable.

(f)

(1)The Fund’s Code of Ethics is attached hereto as Exhibit 12 A.

(2)Not applicable.

(3)Not applicable.

Item 3.  Audit Committee Financial Expert.

The Fund’s Board of Trustees has determined that Joseph J. Kearns, an “independent” Trustee, is an “audit committee financial expert” serving on its audit committee. Under applicable securities laws, a person who is determined to be an audit committee financial expert will not be deemed an “expert” for any purpose, including without limitation for the purposes of Section 11 of the Securities Act of 1933, as a result of being designated or identified as an audit committee financial expert. The designation or identification of a person as an audit committee financial expert does not impose on such person any duties, obligations, or liabilities that are greater than the duties, obligations, and liabilities imposed on such person as a member of the audit committee and Board of Trustees in the absence of such designation or identification

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Item 4.  Principal Accountant Fees and Services.

(a)(b)(c)(d) and (g).  Based on fees billed for the periods shown:

2010

	Registrant			Covered Entities(1)
Audit Fees	$	26,700		N/A
Non-Audit Fees
Audit-Related Fees	$	4,940	(2)	$	6,909,000	(2)
Tax Fees	$	—	(3)	$	1,013,000	(4)
All Other Fees	$			$
Total Non-Audit Fees	$	4,940		$	7,922,000
Total	$	31,640		$	7,922,000

2009

	Registrant			Covered Entities(1)
Audit Fees	$	27,650		N/A
Non-Audit Fees
Audit-Related Fees	$	4,940	(2)	$	6,418,000	(2)
Tax Fees	$	—	(3)	$	881,000	(4)
All Other Fees	$			$		(5)
Total Non-Audit Fees	$	4,940		$	7,299,000
Total	$	32,590		$	7,299,000

N/A- Not applicable, as not required by Item 4.

(1)Covered Entities include the Adviser (excluding sub-advisors) and any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Registrant.

(2)Audit-Related Fees represent assurance and related services provided that are reasonably related to the performance of the audit of the financial statements of the Covered Entities’ and funds advised by the Adviser or its affiliates, specifically data verification and agreed-upon procedures related to asset securitizations and agreed-upon procedures engagements.

(3)Tax Fees represent tax compliance, tax planning and tax advice services provided in connection with the preparation and review of the Registrant’s tax returns.

(4)Tax Fees represent tax compliance, tax planning and tax advice services provided in connection with the review of Covered Entities’ tax returns.

(5)All other fees represent project management for future business applications and improving business and operational processes.

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(e)(1) The audit committee’s pre-approval policies and procedures are as follows:

APPENDIX A

AUDIT COMMITTEE

AUDIT AND NON-AUDIT SERVICES

PRE-APPROVAL POLICY AND PROCEDURES

OF THE

MORGAN STANLEY RETAIL AND INSTITUTIONAL FUNDS

AS ADOPTED AND AMENDED JULY 23, 2004,(1)

1.Statement of Principles

The Audit Committee of the Board is required to review and, in its sole discretion, pre-approve all Covered Services to be provided by the Independent Auditors to the Fund and Covered Entities in order to assure that services performed by the Independent Auditors do not impair the auditor’s independence from the Fund.

The SEC has issued rules specifying the types of services that an independent auditor may not provide to its audit client, as well as the audit committee’s administration of the engagement of the independent auditor.  The SEC’s rules establish two different approaches to pre-approving services, which the SEC considers to be equally valid.  Proposed services either: may be pre-approved without consideration of specific case-by-case services by the Audit Committee (“general pre-approval”); or require the specific pre-approval of the Audit Committee or its delegate (“specific pre-approval”).  The Audit Committee believes that the combination of these two approaches in this Policy will result in an effective and efficient procedure to pre-approve services performed by the Independent Auditors.  As set forth in this Policy, unless a type of service has received general pre-approval, it will require specific pre-approval by the Audit Committee (or by any member of the Audit Committee to which pre-approval authority has been delegated) if it is to be provided by the Independent Auditors.  Any proposed services exceeding pre-approved cost levels or budgeted amounts will also require specific pre-approval by the Audit Committee.

The appendices to this Policy describe the Audit, Audit-related, Tax and All Other services that have the general pre-approval of the Audit Committee.  The term of any general pre-approval is 12 months from the date of pre-approval, unless the Audit Committee considers and provides a different period and states otherwise.  The Audit Committee will annually review and pre-approve the services that may be provided by the Independent Auditors without obtaining specific pre-approval from the Audit Committee.  The Audit Committee will add to or subtract from the list of general pre-approved services from time to time, based on subsequent determinations.

(1)This Audit Committee Audit and Non-Audit Services Pre-Approval Policy and Procedures (the “Policy”), adopted as of the date above, supersedes and replaces all prior versions that may have been adopted from time to time.

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The purpose of this Policy is to set forth the policy and procedures by which the Audit Committee intends to fulfill its responsibilities.  It does not delegate the Audit Committee’s responsibilities to pre-approve services performed by the Independent Auditors to management.

The Fund’s Independent Auditors have reviewed this Policy and believes that implementation of the Policy will not adversely affect the Independent Auditors’ independence.

2.Delegation

As provided in the Act and the SEC’s rules, the Audit Committee may delegate either type of pre-approval authority to one or more of its members.  The member to whom such authority is delegated must report, for informational purposes only, any pre-approval decisions to the Audit Committee at its next scheduled meeting.

3.Audit Services

The annual Audit services engagement terms and fees are subject to the specific pre-approval of the Audit Committee.  Audit services include the annual financial statement audit and other procedures required to be performed by the Independent Auditors to be able to form an opinion on the Fund’s financial statements.  These other procedures include information systems and procedural reviews and testing performed in order to understand and place reliance on the systems of internal control, and consultations relating to the audit.  The Audit Committee will approve, if necessary, any changes in terms, conditions and fees resulting from changes in audit scope, Fund structure or other items.

In addition to the annual Audit services engagement approved by the Audit Committee, the Audit Committee may grant general pre-approval to other Audit services, which are those services that only the Independent Auditors reasonably can provide.  Other Audit services may include statutory audits and services associated with SEC registration statements (on Forms N-1A, N-2, N-3, N-4, etc.), periodic reports and other documents filed with the SEC or other documents issued in connection with securities offerings.

The Audit Committee has pre-approved the Audit services in Appendix B.1.  All other Audit services not listed in Appendix B.1 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated).

4.Audit-related Services

Audit-related services are assurance and related services that are reasonably related to the performance of the audit or review of the Fund’s financial statements and, to the extent they are Covered Services, the Covered Entities or that are traditionally performed by the Independent Auditors.  Because the Audit Committee believes that the provision of Audit-related services does not impair the independence of the auditor and is consistent with the SEC’s rules on auditor independence, the Audit Committee may grant general pre-approval to Audit-related services.  Audit-related services include, among others, accounting consultations related to accounting, financial reporting or disclosure matters

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not classified as “Audit services”; assistance with understanding and implementing new accounting and financial reporting guidance from rulemaking authorities; agreed-upon or expanded audit procedures related to accounting and/or billing records required to respond to or comply with financial, accounting or regulatory reporting matters; and assistance with internal control reporting requirements under Forms N-SAR and/or N-CSR.

The Audit Committee has pre-approved the Audit-related services in Appendix B.2.  All other Audit-related services not listed in Appendix B.2 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated).

5.Tax Services

The Audit Committee believes that the Independent Auditors can provide Tax services to the Fund and, to the extent they are Covered Services, the Covered Entities, such as tax compliance, tax planning and tax advice without impairing the auditor’s independence, and the SEC has stated that the Independent Auditors may provide such services.

Pursuant to the preceding paragraph, the Audit Committee has pre-approved the Tax Services in Appendix B.3.  All Tax services in Appendix B.3 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated).

6.All Other Services

The Audit Committee believes, based on the SEC’s rules prohibiting the Independent Auditors from providing specific non-audit services, that other types of non-audit services are permitted.  Accordingly, the Audit Committee believes it may grant general pre-approval to those permissible non-audit services classified as All Other services that it believes are routine and recurring services, would not impair the independence of the auditor and are consistent with the SEC’s rules on auditor independence.

The Audit Committee has pre-approved the All Other services in Appendix B.4.  Permissible All Other services not listed in Appendix B.4 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated).

7.Pre-Approval Fee Levels or Budgeted Amounts

Pre-approval fee levels or budgeted amounts for all services to be provided by the Independent Auditors will be established annually by the Audit Committee.  Any proposed services exceeding these levels or amounts will require specific pre-approval by the Audit Committee.  The Audit Committee is mindful of the overall relationship of fees for audit and non-audit services in determining whether to pre-approve any such services.

8.Procedures

All requests or applications for services to be provided by the Independent Auditors that do not require specific approval by the Audit Committee will be submitted to the Fund’s Chief Financial Officer and must include a detailed description of the services to be

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rendered.  The Fund’s Chief Financial Officer will determine whether such services are included within the list of services that have received the general pre-approval of the Audit Committee.  The Audit Committee will be informed on a timely basis of any such services rendered by the Independent Auditors.  Requests or applications to provide services that require specific approval by the Audit Committee will be submitted to the Audit Committee by both the Independent Auditors and the Fund’s Chief Financial Officer, and must include a joint statement as to whether, in their view, the request or application is consistent with the SEC’s rules on auditor independence.

The Audit Committee has designated the Fund’s Chief Financial Officer to monitor the performance of all services provided by the Independent Auditors and to determine whether such services are in compliance with this Policy.  The Fund’s Chief Financial Officer will report to the Audit Committee on a periodic basis on the results of its monitoring.  Both the Fund’s Chief Financial Officer and management will immediately report to the chairman of the Audit Committee any breach of this Policy that comes to the attention of the Fund’s Chief Financial Officer or any member of management.

9.Additional Requirements

The Audit Committee has determined to take additional measures on an annual basis to meet its responsibility to oversee the work of the Independent Auditors and to assure the auditor’s independence from the Fund, such as reviewing a formal written statement from the Independent Auditors delineating all relationships between the Independent Auditors and the Fund, consistent with Independence Standards Board No. 1, and discussing with the Independent Auditors its methods and procedures for ensuring independence.

10.Covered Entities

Covered Entities include the Fund’s investment adviser(s) and any entity controlling, controlled by or under common control with the Fund’s investment adviser(s) that provides ongoing services to the Fund(s).  Beginning with non-audit service contracts entered into on or after May 6, 2003, the Fund’s audit committee must pre-approve non-audit services provided not only to the Fund but also to the Covered Entities if the engagements relate directly to the operations and financial reporting of the Fund.  This list of Covered Entities would include:

Morgan Stanley Retail Funds

Morgan Stanley Investment Advisors Inc.

Morgan Stanley & Co. Incorporated

Morgan Stanley DW Inc.

Morgan Stanley Investment Management Inc.

Morgan Stanley Investment Management Limited

Morgan Stanley Investment Management Private Limited

Morgan Stanley Asset & Investment Trust Management Co., Limited

Morgan Stanley Investment Management Company

Van Kampen Asset Management

Morgan Stanley Services Company, Inc.

Morgan Stanley Distributors Inc.

Morgan Stanley Trust FSB

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Morgan Stanley Institutional Funds

Morgan Stanley Investment Management Inc.

Morgan Stanley Investment Advisors Inc.

Morgan Stanley Investment Management Limited

Morgan Stanley Investment Management Private Limited

Morgan Stanley Asset & Investment Trust Management Co., Limited

Morgan Stanley Investment Management Company

Morgan Stanley & Co. Incorporated

Morgan Stanley Distribution, Inc.

Morgan Stanley AIP GP LP

Morgan Stanley Alternative Investment Partners LP

(e)(2)  Beginning with non-audit service contracts entered into on or after May 6, 2003, the audit committee also is required to pre-approve services to Covered Entities to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Registrant. 100% of such services were pre-approved by the audit committee pursuant to the Audit Committee’s pre-approval policies and procedures (attached hereto).

(f)     Not applicable.

(g)    See table above.

(h)    The audit committee of the Board of Trustees has considered whether the provision of services other than audit services performed by the auditors to the Registrant and Covered Entities is compatible with maintaining the auditors’ independence in performing audit services.

Item 5.   Audit Committee of Listed Registrants.

(a)The Fund has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act whose members are:

Joseph Kearns, Michael Nugent and Allen Reed.

(b) Not applicable.

Item 6. Schedule of Investments

(a) Refer to Item 1.

(b) Not applicable.

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Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Applicable only to reports filed by closed-end funds.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Applicable only to reports filed by closed-end funds.

Item 9. Closed-End Fund Repurchases

Applicable only to reports filed by closed-end funds.

Item 10. Submission of Matters to a Vote of Security Holders

Not applicable.

Item 11. Controls and Procedures

(a)  The Fund’s principal executive officer and principal financial officer have concluded that the Fund’s disclosure controls and procedures are sufficient to ensure that information required to be disclosed by the Fund in this Form N-CSR was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, based upon such officers’ evaluation of these controls and procedures as of a date within 90 days of the filing date of the report.

(b)  There were no changes in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Exhibits

(a) The Code of Ethics for Principal Executive and Senior Financial Officers is attached hereto.

(b) A separate certification for each principal executive officer and principal financial officer of the registrant are attached hereto as part of EX-99.CERT.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Morgan Stanley U.S. Government Money Market Trust

/s/ Randy Takian

Randy Takian

Principal Executive Officer

March 23, 2010

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

/s/ Randy Takian

Randy Takian

Principal Executive Officer

March 23, 2010

/s/ Francis Smith

Francis Smith

Principal Financial Officer

March 23, 2010

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