<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-03-24</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000737875</issuerCik>
        <issuerName>FIRST KEYSTONE CORP</issuerName>
        <issuerTradingSymbol>fkys.ob</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001236332</rptOwnerCik>
            <rptOwnerName>COOLEY DUDLEY P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>164 COLONIAL AVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BLOOMSBURG</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>17815</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Director Emeritus</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Retired in role of Director Emeritus as of 9/24/2009</remarks>

    <ownerSignature>
        <signatureName>Linda K. Yerges Attorney in Fact for Dudley P. Cooley</signatureName>
        <signatureDate>2010-03-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0303
4
2010-03-24
1
0000737875
FIRST KEYSTONE CORP
fkys.ob
0001236332
COOLEY DUDLEY P
164 COLONIAL AVE
BLOOMSBURG
PA
17815
0
0
0
1
Director Emeritus
Retired in role of Director Emeritus as of 9/24/2009
Linda K. Yerges Attorney in Fact for Dudley P. Cooley
2010-03-25