<?xml version="1.0"?>

<ownershipDocument>

    <documentType>3/A</documentType>

    <periodOfReport>2003-06-24</periodOfReport>

    <dateOfOriginalSubmission>2003-06-24</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000893467</issuerCik>
        <issuerName>NORTHWEST BANCORPORATION INC</issuerName>
        <issuerTradingSymbol>nbct</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001245235</rptOwnerCik>
            <rptOwnerName>TORGENRUD LEIF C</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>Sr. V.P.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeSecurity>
        <securityTitle>
            <value>Employee Stock Options</value>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>11</value>
        </conversionOrExercisePrice>
        <exerciseDate>
            <value>2004-04-21</value>
            <footnoteId id="F1"/>
        </exerciseDate>
        <expirationDate>
            <value>2013-04-21</value>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Common Stock</value>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>3000</value>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <footnotes>
        <footnote id="F1">These options are on a 20% per year vesting schedule for the 1st five years.  The price will decrease and shares increase for any subsequently issued stock dividends.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Holly Austin, by power of attorney</signatureName>
        <signatureDate>2003-06-27</signatureDate>
    </ownerSignature>

</ownershipDocument>

