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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 LFfIDR7qLcRCFovhugnEyw==

<SEC-DOCUMENT>0001411585-08-000002.txt : 20081112
<SEC-HEADER>0001411585-08-000002.hdr.sgml : 20081111
<ACCEPTANCE-DATETIME>20081112163706
ACCESSION NUMBER:		0001411585-08-000002
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080930
FILED AS OF DATE:		20081112
DATE AS OF CHANGE:		20081112

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST KEYSTONE FINANCIAL INC
		CENTRAL INDEX KEY:			0000856751
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		IRS NUMBER:				232576479
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		22 WEST STATE ST
		CITY:			MEDIA
		STATE:			PA
		ZIP:			19063
		BUSINESS PHONE:		610 565-6210

	MAIL ADDRESS:	
		STREET 1:		22 WEST STATE ST
		CITY:			MEDIA
		STATE:			PA
		ZIP:			19063

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Crain Terry D
		CENTRAL INDEX KEY:			0001411585

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25328
		FILM NUMBER:		081181255

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		610-565-6210

	MAIL ADDRESS:	
		STREET 1:		FIRST KEYSTONE FINANCIAL INC
		STREET 2:		22 WEST STATE ST
		CITY:			MEDIA
		STATE:			PA
		ZIP:			19063

	FORMER NAME:	
		FORMER CONFORMED NAME:	Crane Terry D
		DATE OF NAME CHANGE:	20070905
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2008-09-30</periodOfReport>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000856751</issuerCik>
        <issuerName>FIRST KEYSTONE FINANCIAL INC</issuerName>
        <issuerTradingSymbol>FKFS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001411585</rptOwnerCik>
            <rptOwnerName>Crain Terry D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FIRST KEYSTONE FINANCIAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>22 WEST STATE STREET</rptOwnerStreet2>
            <rptOwnerCity>MEDIA</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19063</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP/Internal Auditor</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7119</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1282.441</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>ESOP</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes total shares acquired at calendar year ended 12/31/07 under the Company's Employee Stock Ownership Plan (ESOP).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Terry D. Crain</signatureName>
        <signatureDate>2008-11-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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