-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BWF2xcf6DmjNDidtiGe2dvA5WYNSpNXPcYhe3/E0il4kLVjOCi/qwupP/DActlD8
 euKTyDNWnH+yRLnoyxbKdQ==

<SEC-DOCUMENT>0001056520-08-000741.txt : 20081224
<SEC-HEADER>0001056520-08-000741.hdr.sgml : 20081224
<ACCEPTANCE-DATETIME>20081224161337
ACCESSION NUMBER:		0001056520-08-000741
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20081223
FILED AS OF DATE:		20081224
DATE AS OF CHANGE:		20081224

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CRESCENT CAPITAL VI LLC
		CENTRAL INDEX KEY:			0001276514
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23881
		FILM NUMBER:		081270631

	BUSINESS ADDRESS:	
		STREET 1:		11624 SE 5TH ST
		STREET 2:		SUITE 200
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98005
		BUSINESS PHONE:		5255867700

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Gow Jeffery D
		CENTRAL INDEX KEY:			0001452657

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23881
		FILM NUMBER:		081270630

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		425-586-7700

	MAIL ADDRESS:	
		STREET 1:		11624 SE 5TH STREET
		STREET 2:		SUITE 200
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98005

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COWLITZ BANCORPORATION
		CENTRAL INDEX KEY:			0000894267
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				911529841
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		927 COMMERCE AVE
		CITY:			LONGVIEW
		STATE:			WA
		ZIP:			98632
		BUSINESS PHONE:		2064239800

	MAIL ADDRESS:	
		STREET 1:		927 COMMERCE AVENUE
		CITY:			LONGVIEW
		STATE:			WA
		ZIP:			98632
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-12-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000894267</issuerCik>
        <issuerName>COWLITZ BANCORPORATION</issuerName>
        <issuerTradingSymbol>CWLZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276514</rptOwnerCik>
            <rptOwnerName>CRESCENT CAPITAL VI LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001452657</rptOwnerCik>
            <rptOwnerName>Gow Jeffery D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11624 SE 5TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>BELLEVUE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Rqd to file per Rule 16a-1</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-12-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>80000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.96</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>778360</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Jeffery D. Gow, joint filer herein, is reporting a 59% owneship of the shares acquired by Crescent Capital VI, LLC (CCVI).  Mr. Gow's ownership is indirect.  Mr. Gow is filing this form 4 as required by Rule 16a-1 but does not have a pecuniary interest in greater than 10% of the Issuer's common stock.  Mr. Gow disclaims beneficial ownership of the shares owned by CCVI except as described in this footnote.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Steven D. Wasson, Crescent Capital VI, LLC</signatureName>
        <signatureDate>2008-12-23</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Christopher J. W. Eadon, POA for Jeffery D. Gow</signatureName>
        <signatureDate>2008-12-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----