<SUBMISSION>
<ACCESSION-NUMBER>0001181431-04-003073
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20040114
<FILING-DATE>20040116
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>SHER KAREN
<CIK>0001276549
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-15373
<FILM-NUMBER>04530020
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>150 NORTH MERAMEC
<CITY>CLAYTON
<STATE>MO
<ZIP>63105
<PHONE>3147255500
</BUSINESS-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>ENTERPRISE FINANCIAL SERVICES CORP
<CIK>0001025835
<ASSIGNED-SIC>6022
<IRS-NUMBER>431706259
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>150 NORTH MERAMEC
<STREET2>150 NORTH MERAMEC
<CITY>CLAYTON
<STATE>MO
<ZIP>63105
<PHONE>3147255500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>150 NORTH MERAMEC
<STREET2>150 NORTH MERAMEC
<CITY>CLAYTON
<STATE>MO
<ZIP>63105
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ENTERBANK HOLDINGS INC
<DATE-CHANGED>19961024
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>rrd29341.xml
<DESCRIPTION>FORM 3 - SHER
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType><periodOfReport>2004-01-14</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001025835</issuerCik>
        <issuerName>ENTERPRISE FINANCIAL SERVICES CORP</issuerName>
        <issuerTradingSymbol>EFSC</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276549</rptOwnerCik>
            <rptOwnerName>SHER KAREN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>150 NORTH MERAMEC</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CLAYTON</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63105</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>1</isOther><otherText>Corporate Secretary</otherText></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>SPOUSE TRUST</value></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><ownerSignature><signatureName>KAREN SHER BY POWER OF ATTORNEY</signatureName><signatureDate>2004-01-16</signatureDate></ownerSignature></ownershipDocument>



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