Exhibit 99.1

UNITED SECURITY BANCSHARES, INC.

RESCHEDULES ANNUAL MEETING

THOMASVILLE, Ala. (May 19, 2011) – United Security Bancshares, Inc. (NASDAQ: USBI) today announced that the Company’s 2011 Annual Meeting of Shareholders has been rescheduled for August 9, 2011, at 2:00 p.m. local time, at Alabama Southern Community College, 30755 Highway 43 South, Thomasville, Alabama 36784. The Annual Meeting has been further adjourned and postponed from May 24, 2011 (previously adjourned from May 12, 2011) to provide the Company’s shareholders additional time to review and consider the Company’s amended and restated consolidated financial statements for the year ended December 31, 2010.

Shareholders will be provided updated proxy materials and new proxy cards in connection with the rescheduled Annual Meeting. The Company’s Board of Directors has fixed the close of business on June 22, 2011 as the record date for the determination of shareholders entitled to notice of and to vote at the rescheduled Annual Meeting.

About United Security Bancshares, Inc.

United Security Bancshares, Inc. is a bank holding company that operates nineteen banking offices in Alabama through First United Security Bank. In addition, the Company’s operations include Acceptance Loan Company, Inc., a consumer loan company, and FUSB Reinsurance, Inc., an underwriter of credit life and credit accident and health insurance policies sold to the bank’s and ALC’s consumer loan customers. The Company’s stock is traded on the Nasdaq Capital Market under the symbol “USBI.”

Forward-Looking Statements

This press release contains forward-looking statements, as defined by federal securities laws. Statements contained in this press release that are not historical facts are forward-looking statements. These statements may address issues that involve significant risks, uncertainties, estimates and assumptions made by management. USBI undertakes no obligation to update these statements following the date of this press release, except as required by law. In addition, USBI, through its senior management, may make from time to time forward-looking public statements concerning the matters described herein. Such forward-looking statements are necessarily estimates reflecting the best judgment of USBI’s senior management based upon current information and involve a number of risks and uncertainties. Certain factors that could affect the accuracy of such forward-looking statements are identified in the public filings made by USBI with the Securities and Exchange Commission, and forward-looking statements contained in this press release or in other public statements of USBI or its senior management should be considered in light of those factors. With respect to the adequacy of the allowance for loan losses for USBI, these factors include, but are not limited to, the rate of growth (or lack thereof) in the economy, the relative strength and weakness in the consumer and commercial credit sectors and in the real estate markets and collateral values. There can be no assurance that such factors or other factors will not affect the accuracy of such forward-looking statements.

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