425

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to
Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report: December 1, 2006

United Security Bancshares

(Exact Name of Registrant as Specified in its Charter)

California	000-32987	91-2112732
(State or Other Jurisdiction of Incorporation)	Commission File Number	(I.R.S. Employer Identification No.)

2126 Inyo Street , Fresno, California	93721
(Address of Principal Executive Offices)	(Zip Code)

(559) 248-4944

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2):

x Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01 Entry Into a Material Definitive Agreement

          United Security Bancshares on December 1, 2006 entered into the first amendment (“First Amendment”) to the Agreement and Plan of Reorganization and Merger (“Original Agreement’) dated October 6, 2006 by and among United Security Bancshares, a California corporation (“Bancshares”); United Security Bank, a California banking corporation and wholly-owned subsidiary of Bancshares (“USB”) and Legacy Bank, N.A. a national banking association.  The First Amendment amends the Original Agreement to remove the condition on closing that the Average Closing Price as defined in the Original Agreement be less than $25, and also amends the Original Agreement to fix the Average Closing Price to no more than $25.

Item 9.01	Financial Statements and Exhibits.
(d)	Exhibits.
	10.1  First Amendment to the Agreement and Plan of Reorganization and Merger dated October 6, 2006.

SIGNATURES

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

	UNITED SECURITY BANCSHARES
Date: December 04, 2006	By:	/s/ Kenneth L. Donahue
		Kenneth L. Donahue
		Vice President/Chief Financial Officer

EXHIBIT INDEX

EXHIBIT #	DESCRIPTION
10.1	First Amendment to the Agreement and Plan of Reorganization and Merger dated October 6, 2006.

EX-10.1

EXHIBIT 10.1

FIRST AMENDMENT TO THE
AGREEMENT AND PLAN OF REORGANIZATION AND MERGER

          This First Amendment (“Amendment”) to the Agreement and Plan of Reorganization and Merger dated October 6, 2006 (the “Original Agreement”) is entered as of December 1, 2006, by and among United Security Bancshares, a California corporation (“Bancshares”); United Security Bank, a California banking corporation and wholly-owned subsidiary of Bancshares (“USB”) and Legacy Bank, N.A. a national banking association (“Legacy”).

RECITALS:

          WHEREAS, Bancshares, USB and Legacy entered into the Original Agreement, and the parties desire to amend the Original Agreement by this Amendment to lift the $25 cap on the Average Closing Price as defined in the Original Agreement.

          NOW, THEREFORE, in consideration of these premises and mutual covenants herein contained, Bancshares, USB and Legacy hereby agree as follows:

          1.          Definition of Average Closing Price.  The definition of “Average Closing Price” in the Definitions section of Article I of the Original Agreement is amended in its entirety as follows:

“Average Closing Price” shall mean the average of the daily closing price of a share of Bancshares Common Stock reported on the NASDAQ Global Select Market during the 20 consecutive trading days ending at the end of the fifth trading day immediately preceding the Effective Time, provided that in no event shall the Average Closing Price be more than $25.00.

          2.          Condition to Closing.  Section 7.1.6 of the Original Agreement is amended to read in its entirety as follows:

          7.1.6  The Average Closing Price shall not be less than $20.00.

          3.          References.  Upon execution and delivery of this Amendment, all references in the Original Agreement to the “Agreement,” and the provisions thereof, shall be deemed to refer to the Original Agreement, as amended by this Amendment.

          4.          No Other Amendments or Changes.  Except as expressly amended or modified by this Amendment, all of the terms and conditions of the Original Agreement shall remain unchanged and in full force and effect.

          5.          Definitions.  All capitalized terms used herein and not otherwise defined or amended shall have the meanings given to them in the Original Agreement.

          IN WITNESS WHEREOF, Bancshares, USB and Legacy have caused this Amendment to be signed by their respective officers thereunto duly authorized, all as of the date first above written.

United Security Bancshares		Legacy Bank
By:	/s/ Ronnie D. Miller	By:	Gary L. Hong
Name:	Ronnie D. Miller	Name:	Gary L. Hong
By:	/s/ Dennis R. Woods	By:	Thomas E. Ray
Name:	Dennis R. Woods	Name:	Thomas E. Ray
United Security Bank
By:	/s/ Ronnie D. Miller
Name:	Ronnie D. Miller
By:	/s/ Dennis R. Woods
Name:	Dennis R. Woods