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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

For the quarterly period ended June 30, 2011

OR

Commission File Number: 1-10982

Cross Timbers Royalty Trust

(Exact name of registrant as specified in its charter)

(877) 228-5084

(Registrant’s telephone number, including area code)

NONE

(Former name, former address and former fiscal year, if change since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  ¨    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act (check one):

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2).     Yes  ¨    No  þ

Indicate the number of units of beneficial interest outstanding, as of the latest practicable date:

Outstanding as of July 1, 2011

6,000,000

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CROSS TIMBERS ROYALTY TRUST

FORM 10-Q FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2011

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CROSS TIMBERS ROYALTY TRUST

GLOSSARY OF TERMS

The following are definitions of significant terms used in this Form 10-Q:

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CROSS TIMBERS ROYALTY TRUST

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

The condensed financial statements included herein are presented, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in annual financial statements have been condensed or omitted pursuant to such rules and regulations, although the trustee believes that the disclosures are adequate to make the information presented not misleading. These condensed financial statements should be read in conjunction with the financial statements and the notes thereto included in the trust’s latest Annual Report on Form 10-K. In the opinion of the trustee, all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the assets, liabilities and trust corpus of the Cross Timbers Royalty Trust at June 30, 2011, and the distributable income and changes in trust corpus for the three- and six-month periods ended June 30, 2011 and 2010, have been included. Distributable income for such interim periods is not necessarily indicative of distributable income for the full year.

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CROSS TIMBERS ROYALTY TRUST

Condensed Statements of Assets, Liabilities and Trust Corpus

The accompanying notes to condensed financial statements are an integral part of these statements.

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CROSS TIMBERS ROYALTY TRUST

Condensed Statements of Distributable Income (Unaudited)

The accompanying notes to condensed financial statements are an integral part of these statements.

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CROSS TIMBERS ROYALTY TRUST

Condensed Statements of Changes in Trust Corpus (Unaudited)

The accompanying notes to condensed financial statements are an integral part of these statements.

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CROSS TIMBERS ROYALTY TRUST

Notes to Condensed Financial Statements (Unaudited)

The financial statements of Cross Timbers Royalty Trust are prepared on the following basis and are not intended to present financial position and results of operations in conformity with U.S. generally accepted accounting principles (“GAAP”):

Costs deducted in the calculation of net proceeds for the 90% net profits interests generally include applicable taxes, transportation, marketing and legal costs, and do not include production expense or development costs. For the 75% net profits interests, costs deducted in the calculation of net proceeds include production expense, development costs, applicable taxes, transportation, marketing and legal costs, operating charges and other costs.

The financial statements of the trust differ from those prepared in conformity with U.S. GAAP because revenues are recognized when received rather than accrued in the month of production, expenses are recognized when paid rather than when incurred, and certain cash reserves may be established by the trustee for contingencies which would not be recorded under U.S. GAAP. This comprehensive basis of accounting other than U.S. GAAP corresponds to the accounting permitted for royalty trusts by the U.S. Securities and Exchange Commission, as specified by Staff Accounting Bulletin Topic 12:E, Financial Statements of Royalty Trusts.

Most accounting pronouncements apply to entities whose financial statements are prepared in accordance with U.S. GAAP, directing such entities to accrue or defer revenues and expenses in a period other than when such revenues were received or expenses were paid. Because the trust’s financial statements are prepared on the modified cash basis, as described above, most accounting pronouncements are not applicable to the trust’s financial statements.

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The initial carrying value of the net profits interests of $61,100,449 represents XTO Energy’s historical net book value for the interests on February 12, 1991, the creation date of the trust. Amortization of the net profits interests is calculated on a unit-of-production basis and is charged directly to trust corpus. Accumulated amortization was $47,141,191 as of June 30, 2011 and $46,579,102 as of December 31, 2010.

For federal income tax purposes, the trust constitutes a fixed investment trust which is taxed as a grantor trust. A grantor trust is not subject to tax at the trust level. The unitholders are considered to own the trust’s income and principal as though no trust were in existence. The income of the trust is deemed to have been received or accrued by each unitholder at the time such income is received or accrued by the trust and not when distributed by the trust.

The net profits interests constitute “economic interests” in oil and gas properties for federal income tax purposes. Unitholders must report their share of the net profits income as ordinary income from oil and gas properties and are entitled to claim depletion with respect to such income. The classification of the trust’s income for purposes of the passive loss rules may be important to a unitholder. Net profits income generally is treated as portfolio income and does not offset passive losses.

Some trust units are held by middlemen, as such term is broadly defined in U.S. Treasury Regulations (and includes custodians, nominees, certain joint owners, and brokers holding an interest for a customer in street name, collectively referred to herein as “middlemen”). Therefore, the trustee considers the trust to be a non-mortgage widely held fixed investment trust (“WHFIT”) for U.S. federal income tax purposes. U.S. Trust, Bank of America Private Wealth Management, EIN: 56-0906609, Post Office Box 830650, Dallas, Texas. 75283-0650, telephone number 1-877-228-5084, email address trustee@crosstimberstrust.com, is the representative of the trust that will provide tax information in accordance with applicable U.S. Treasury Regulations governing the information reporting requirements of the trust as a WHFIT. Tax information is also posted by the trustee at www.crosstimberstrust.com. Notwithstanding the foregoing, the middlemen holding trust units on behalf of unitholders, and not the trustee of the trust, are solely responsible for complying with the information reporting requirements under the U.S. Treasury Regulations with respect to such trust units, including the issuance of IRS Forms 1099 and certain written tax statements. Unitholders whose trust units are held by middlemen should consult with such middlemen regarding the information that will be reported to them by the middlemen with respect to the trust units.

Unitholders should consult their tax advisors regarding trust tax compliance matters.

Several states have enacted legislation requiring state income tax withholding from nonresident recipients of oil and gas proceeds. After consultation with its tax counsel, the trustee believes that it is not required to withhold on payments made to the unitholders. However, regulations are subject to change by the various states, which could change this conclusion. Should withholding be required on payments made to the trust or the unitholders, distributions to the unitholders would be reduced by the required amount, subject to the filing of a claim for refund by the trust or unitholders for such amount.

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Item 2. Trustee’s Discussion and Analysis.

The following discussion should be read in conjunction with the trustee’s discussion and analysis contained in the trust’s 2010 Annual Report on Form 10-K, as well as the condensed financial statements and notes thereto included in this Quarterly Report on Form 10-Q. The trust’s Annual Report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and all amendments to those reports are available on the trust’s web site at www.crosstimberstrust.com.

Distributable Income

Quarter

For the quarter ended June 30, 2011, net profits income was $4,569,004 compared to $4,599,294 for second quarter 2010. This 1% decrease in net profits income is the result of lower gas prices ($0.6 million) and decreased oil and gas sales volumes ($0.4 million), partially offset by higher oil prices ($0.8 million) and decreased production expense ($0.1 million). See “Net Profits Income” on following page.

After considering interest income of $49 and administration expense of $138,923, distributable income for the quarter ended June 30, 2011 was $4,430,130, or $0.738355 per unit of beneficial interest. Administrative expense for the quarter increased 20% from the prior year quarter primarily because of the timing of expenditures. For second quarter 2010, distributable income was $4,483,404, or $0.747234 per unit. Distributions to unitholders for the quarter ended June 30, 2011 were:

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Six Months

For the six months ended June 30, 2011, net profits income was $8,919,857 compared to $8,868,374 for the same 2010 period. This 1% increase in net profits income is the result of higher oil prices ($1.1 million) and decreased taxes, transportation and other costs ($0.1 million), partially offset by lower gas prices ($0.7 million) and decreased gas sales volumes ($0.5 million). See “Net Profits Income” below.

After considering interest income of $143 and administration expense of $265,696, distributable income for the six months ended June 30, 2011 was $8,654,304, or $1.442384 per unit of beneficial interest. Administrative expense for the six months ended June 30, 2011 decreased 7% from the prior year six-month period primarily because of the timing of expenditures. For the six months ended June 30, 2010, distributable income was $8,581,980, or $1.430330 per unit.

Net Profits Income

Net profits income is recorded when received by the trust, which is the month following receipt by XTO Energy and generally two months after oil production and three months after gas production. Net profits income is generally affected by three major factors:

Because properties underlying the 90% net profits interests are royalty and overriding royalty interests, the calculation of net profits income from these interests only includes deductions for production and property taxes, legal costs, and marketing and transportation charges. In addition to these costs, the calculation of net profits income from the 75% net profits interests includes deductions for production expense and development costs since the related underlying properties are working interests.

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The following is a summary of the calculation of net profits income received by the trust:

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The following are explanations of significant variances on the underlying properties from second quarter 2010 to second quarter 2011 and from the first six months of 2010 to the comparable period in 2011:

Sales Volumes

Oil

Oil sales volumes decreased 6% for second quarter 2011 as compared with the same 2010 period primarily because of natural production decline. Oil sales volumes remained relatively flat for the first six months of 2011 as compared with the same 2010 period primarily because natural production decline was partially offset by the timing of cash receipts.

Gas

Gas sales volumes decreased 5% for second quarter 2011 and 8% for the first six months of 2011 as compared with the same 2010 periods primarily because of natural production decline and the timing of cash receipts, partially offset by increased production from new wells and workovers.

The rate of natural production decline on the underlying oil and gas properties is approximately 6% to 8% a year.

Sales Prices

Oil

The average oil price increased 25% to $93.79 per Bbl for the second quarter and 18% to $86.08 per Bbl for the six-month period. Oil prices are expected to remain volatile. The second quarter 2011 oil price is primarily related to production from February through April 2011, when the average NYMEX price was $101.00 per Bbl. The average NYMEX price for May and June 2011 was $98.69 per Bbl. At July 18, 2011, the average NYMEX futures price for the following twelve months was $98.32 per Bbl.

Gas

Gas prices for the second quarter decreased 16% to $7.04 per Mcf and for the six-month period decreased 10% to $6.86 per Mcf. Natural gas prices are affected by the level of North American production, weather, crude oil and natural gas liquids prices, the U.S. economy, storage levels and import levels of liquefied natural gas. Natural gas prices are expected to remain volatile. The second quarter 2011 gas price is primarily related to production from January through March 2011, when the average NYMEX price was $4.11 per MMBtu. The average NYMEX price for April through June 2011 was $4.31 per MMBtu. At July 18, 2011, the average NYMEX futures price for the following twelve months was $4.74 per MMBtu.

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Costs

Taxes, Transportation and Other

Taxes, transportation and other decreased 2% for the second quarter and 7% for the six-month period primarily because of decreased gas production taxes related to lower gas revenues, partially offset by increased oil production taxes related to higher oil revenues.

Production Expense

Production expense was 13% lower for the second quarter and 5% lower for the six-month period primarily because of decreased repairs and maintenance, carbon dioxide injection, power and fuel and plugging and abandonment costs, partially offset by increased outside operated costs. In addition, decreased production expense for the six-month period was also partially offset by increased labor costs.

Development

Development costs decreased 17% for the second quarter primarily due to the timing of cash disbursements. Development costs increased 53% for the six-month period primarily because of increased activity and costs related to Texas and Oklahoma properties underlying the 75% net profits interest.

Contingencies

Several states have enacted legislation requiring state income tax withholding from nonresident recipients of oil and gas proceeds. After consultation with its tax counsel, the trustee believes that it is not required to withhold on payments made to the unitholders. However, regulations are subject to change by the various states, which could change this conclusion. Should withholding be required on payments made to the trust or the unitholders, distributions to the unitholders would be reduced by the required amount, subject to the filing of a claim for refund by the trust or unitholders for such amount.

Forward-Looking Statements

Statements in this report relating to future plans, predictions, events or conditions are forward-looking statements. All statements other than statements of historical fact included in this Form 10-Q including, without limitation, statements regarding the net profits interests, underlying properties, development activities, development, production and other costs and expenses, oil and gas prices and differentials to NYMEX prices, distributions to unitholders and industry and market conditions, are forward-looking statements that are subject to risks and uncertainties which are detailed in Part I, Item 1A of the trust’s Annual Report on Form 10-K for the year ended December 31, 2010, which is incorporated by this reference as though fully set forth herein. XTO Energy and the trustee assume no duty to update these statements as of any future date.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

There have been no material changes in the trust’s market risks from the information disclosed in Part II, Item 7A of the trust’s Annual Report on Form 10-K for the year ended December 31, 2010.

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Item 4. Controls and Procedures.

As of the end of the period covered by this report, the trustee carried out an evaluation of the effectiveness of the trust’s disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15. Based upon that evaluation, the trustee concluded that the trust’s disclosure controls and procedures are effective in recording, processing, summarizing and reporting, on a timely basis, information required to be disclosed by the trust in the reports that it files or submits under the Securities Exchange Act of 1934 and are effective in ensuring that information required to be disclosed by the trust in the reports that it files or submits under the Securities Exchange Act of 1934 is accumulated and communicated to the trustee to allow timely decisions regarding required disclosure. In its evaluation of disclosure controls and procedures, the trustee has relied, to the extent considered reasonable, on information provided by XTO Energy. There has not been any change in the trust’s internal control over financial reporting during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the trust’s internal control over financial reporting.

PART II - OTHER INFORMATION

Item 1.

Not applicable.

Item 1A. Risk Factors.

There have been no material changes in the risk factors disclosed under Part I, Item 1A of the trust’s Annual Report on Form 10-K for the year ended December 31, 2010.

Items 2 through 5.

Not applicable.

Item 6. Exhibits.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.

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