<SUBMISSION>
<ACCESSION-NUMBER>0001137547-03-000045
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20020620
<FILING-DATE>20030620
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>UNITED SECURITY BANCSHARES
<CIK>0001137547
<ASSIGNED-SIC>6021
<IRS-NUMBER>912112732
<STATE-OF-INCORPORATION>CA
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>1525 E SHAW AVENUE
<CITY>FRESO
<STATE>CA
<ZIP>93710
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1525 E SHAW AVENUE
<CITY>FRESNO
<STATE>CA
<ZIP>93710
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>REINHARD WALTER
<CIK>0001145941
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-32897
<FILM-NUMBER>03751298
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>1525 E SHAW AVE
<CITY>FRESNO
<STATE>CA
<ZIP>93710
<PHONE>5592484943
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1525 E SHAW AVE
<CITY>FRESNO
<STATE>CA
<ZIP>93710
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>reinhardform40603_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<!-- - EDGAR Ease Plus 1.0                                   04/22/03  TZ    -->
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
   <periodOfReport>2002-06-20</periodOfReport>
    <issuer>
        <issuerCik>0001137547</issuerCik>
        <issuerName>UNITED SECURITY BANCSHARES</issuerName>
        <issuerTradingSymbol>UBFO</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
      <reportingOwnerId>
            <rptOwnerCik>0001145941</rptOwnerCik>
            <rptOwnerName>REINHARD WALTER</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>1</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>0</isTenPercentOwner>
         <isOther>0</isOther>
       </reportingOwnerRelationship>
   </reportingOwner>
   <nonDerivativeSecurity>
      <securityTitle>
         <value>Common Stock</value>
      </securityTitle>
      <transactionDate>
         <value>2003-06-13</value>
      </transactionDate>
      <deemedExecutionDate>
         <value>2003-06-13</value>
      </deemedExecutionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>P</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>172</value>
         </transactionShares>
         <transactionValue>
           <value>3784.00</value>
         </transactionValue>
         <transactionAcquiredDisposedCode>
           <value>A</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
     <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>175601</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </nonDerivativeSecurity>
   <nonDerivativeSecurity>
      <securityTitle>
         <value>Common Stock</value>
      </securityTitle>
      <transactionDate>
         <value>2003-06-16</value>
      </transactionDate>
      <deemedExecutionDate>
         <value>2003-06-16</value>
      </deemedExecutionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>P</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>100</value>
         </transactionShares>
         <transactionValue>
           <value>2209</value>
         </transactionValue>
         <transactionAcquiredDisposedCode>
           <value>A</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
     <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>4800</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
            <value>Custodian for grandchildren</value>
         </natureOfOwnership>
      </ownershipNature>
   </nonDerivativeSecurity>
   <ownerSignature>
      <signatureName>/s/ Walter Reinhard</signatureName>
      <signatureDate>2003-06-20</signatureDate>
   </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
