<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-08-01</periodOfReport>
    <issuer>
        <issuerCik>0000892449</issuerCik>
        <issuerName>VENTURE FINANCIAL GROUP INC</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001224708</rptOwnerCik>
            <rptOwnerName>JONES JON M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VENTURE BANK</rptOwnerStreet1>
            <rptOwnerStreet2>721 COLLEGE ST SE</rptOwnerStreet2>
            <rptOwnerCity>LACEY</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98503</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>EXECUTIVE VICE PRESIDENT</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>12580</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>11894</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>EMPLOYEE STOCK OWNERSHIP PLAN HELD BY TRUSTEES</value></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>11.19</value></conversionOrExercisePrice><exerciseDate><value>1998-11-01</value></exerciseDate><expirationDate><value>2007-10-31</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>21000</value><footnoteId id="F1"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>21000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>15.00</value></conversionOrExercisePrice><exerciseDate><value>2000-03-24</value></exerciseDate><expirationDate><value>2009-03-23</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>10000</value><footnoteId id="F2"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>31000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>11.50</value></conversionOrExercisePrice><exerciseDate><value>2001-02-16</value></exerciseDate><expirationDate><value>2010-02-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>6000</value><footnoteId id="F3"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>37000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>10.00</value></conversionOrExercisePrice><exerciseDate><value>2002-12-19</value></exerciseDate><expirationDate><value>2011-12-18</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>4000</value><footnoteId id="F4"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>41000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>10.25</value></conversionOrExercisePrice><exerciseDate><value>2003-04-19</value></exerciseDate><expirationDate><value>2012-04-18</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>3000</value><footnoteId id="F5"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>44000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeTransaction><securityTitle><value>COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>20.50</value></conversionOrExercisePrice><transactionDate><value>2003-08-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-08-01</value></exerciseDate><expirationDate><value>2013-07-31</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>5000</value><footnoteId id="F6"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>49000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The option vests in five equal annual installments beginning 11/1/1998</footnote><footnote id="F2">The option vests in five equal annual installments beginning 3/24/2000</footnote><footnote id="F3">The option vests in five equal annual installments beginnging 02/16/2001</footnote><footnote id="F4">The option vests in five equal annual installments beginning 12/19/2002</footnote><footnote id="F5">The option vests in five equal annual installments beginning 04/19/2003</footnote><footnote id="F6">The option vests in five eaqual annual installments beginning 08/01/2004</footnote></footnotes><remarks/><ownerSignature><signatureName>LEIGH BAXTER, ATTORNEY IN FACT</signatureName><signatureDate>2003-08-01</signatureDate></ownerSignature></ownershipDocument>

