10-Q/A

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2010.

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO             .

Commission file number: 000-32987

UNITED SECURITY BANCSHARES

 (Exact name of registrant as specified in its charter)

CALIFORNIA	91-2112732
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

2126 Inyo Street, Fresno, California	93721
(Address of principal executive offices)	(Zip Code)

Registrants telephone number, including area code  (559) 248-4943

Indicate by check mark whether the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes o  No x

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 for the past 90 days.

Yes x  No o

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 o  No x

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act).

Large accelerated filer o  Accelerated filer o Non-accelerated filer o Small reporting company x

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

Aggregate market value of the Common Stock held by non-affiliates as of the last business day of the registrant's most recently completed second fiscal quarter - June 30, 2010: $32,434,746

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

Common Stock, no par value

(Title of Class)

Shares outstanding as of October 31, 2010: 12,875,089  

TABLE OF CONTENTS

Facing Page

Signatures

EXHIBIT INDEX

EX-31.1

EX-31.2

EX-32.1

EX-32.2

Explanatory Note

This Amendment No. 1 on Form 10-Q/A (“Amendment No. 1”) amends the Quarterly Report on Form 10-Q of United Security Bancshares (“Company”) for the quarter ended September 30, 2010, filed with the Securities and Exchange Commission (“SEC”) on November 15, 2010 (the “Original 10-Q”). This Amendment No. 1 is being filed for the sole purpose of indicating the registrant as a small reporting company.  Although the aggregate market value of the Common Stock held by non-affiliates as of the last business day of the registrant's most recently completed second fiscal quarter (June 30, 2010) qualified the registrant as small reporting company, the registrant had inadvertently filed the original 10-Q as a non-accelerated filer.

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.

	United Security Bancshares
Date:     April 1, 2011	/S/ Dennis R. Woods
		Dennis R. Woods
		President and
		Chief Executive Officer
	/S/ Richard B. Shupe
		Richard B. Shupe
		Senior Vice President and Chief Financial Officer

EX-31.1

Exhibit 31.1

CERTIFICATION UNDER SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Dennis R. Woods, certify that:

1.      I have reviewed this report on Form 10-Q of United Security Bancshares;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13(a) - 15(e) and 15d - 15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent quarter (the registrant’s fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  April 1, 2011

/S/ Dennis R. Woods

Dennis R. Woods

President and Chief Executive Officer

A signed original of this written statement required by Section 302 of the Sarbanes-Oxley Act of 2002 has been provided to United Security Bancshares and will be retained by United Security Bancshares and furnished to the SEC or its staff upon request.

EX-31.2

Exhibit 31.2

CERTIFICATION UNDER SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Richard B. Shupe, certify that:

1. I have reviewed this report on Form 10-Q of United Security Bancshares;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13(a) - 15(e) and 15d - 15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent quarter (the registrant’s fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:     April 1, 2011

/S/ Richard B. Shupe

Richard B. Shupe

Senior Vice President and Chief Financial Officer

A signed original of this written statement required by Section 302 of the Sarbanes-Oxley Act of 2002 has been provided to United Security Bancshares and will be retained by United Security Bancshares and furnished to the SEC or its staff upon request.

EX-32.1

Exhibit 32.1

SECTION 906 CERTIFICATION

The certification set forth below is being submitted to the Securities and Exchange Commission solely for the purpose of complying with Section 1350 of Chapter 63 of Title 18 of the United States Code.

April 1, 2011

Dennis R. Woods, the Chief Executive Officer of United Security Bancshares certifies:

1. that this quarterly  report on Form 10-Q for the period ended September 30, 2010 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. that information contained in this quarterly report on Form 10-Q for the period ended September 30, 2010 fairly presents, in all material respects, the financial condition and results of operations of United Security Bancshares.

/s/ Dennis R. Woods

Dennis R. Woods

President and Chief Executive Officer

EX-32.2

Exhibit 32.2

SECTION 906 CERTIFICATION

The certification set forth below is being submitted to the Securities and Exchange Commission solely for the purpose of complying with Section 1350 of Chapter 63 of Title 18 of the United States Code.

April 1, 2011

Richard B. Shupe, the Chief Financial Officer of United Security Bancshares certifies:

1. that this quarterly  report on Form 10-Q for the period ended September 30, 2010 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. that information contained in this quarterly report on Form 10-Q for the period ended September 30, 2010 fairly presents, in all material respects, the financial condition and results of operations of United Security Bancshares.

/s/ Richard B. Shupe

Richard B. Shupe

Senior Vice President and Chief Financial Officer