<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4/A</documentType>

    <periodOfReport>2003-06-19</periodOfReport>

    <dateOfOriginalSubmission>2003-06-23</dateOfOriginalSubmission>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001094635</issuerCik>
        <issuerName>SECURITY FINANCIAL BANCORP INC</issuerName>
        <issuerTradingSymbol>SFBI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001204254</rptOwnerCik>
            <rptOwnerName>NICHOLAS JOHN F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-06-19</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>D</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>2000</value>
                <footnoteId id="F1"/>
            </transactionShares>
            <transactionValue>
                <value>0</value>
                <footnoteId id="F2"/>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>0</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>I</value>
            </directOrIndirectOwnership>
            <natureOfOwnership>
                <value>By RRP Award</value>
            </natureOfOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <footnotes>
        <footnote id="F1">The original Form 4 reported the dispostion of 6,000 shares held indirectly by the Reporting Person through an RRP Award.  The Reporting Person only disposed of 2,000 shares held indirectly through an RRP Award.</footnote>
        <footnote id="F2">Pursuant to the Agreement and Plan of Reorganization, dated February 6, 2003, by and among Security Financial Bancorp, Inc., Standard Bancshares, Inc. and Standard Acquisition Corporation, each share of Security Financial Bancorp, Inc. common stock was exchanged for $24.00 in cash.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>John F. Nicholas</signatureName>
        <signatureDate>2003-07-01</signatureDate>
    </ownerSignature>

</ownershipDocument>

