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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 DSBDfIf622Z0GWjtTjk865k0XRfqHleBTXcyYgbsoRtUMDVBE24vIC9Nk8uK37qa
 egib1VQJCwUSW4qHuGAtFQ==

<SEC-DOCUMENT>9999999995-07-004662.txt : 20071130
<SEC-HEADER>9999999995-07-004662.hdr.sgml : 20071130
<ACCEPTANCE-DATETIME>20071130001521
ACCESSION NUMBER:		9999999995-07-004662
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20071129
DATE AS OF CHANGE:		20071130
EFFECTIVENESS DATE:		20071129

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA BANKING SYSTEM INC
		CENTRAL INDEX KEY:			0000887343
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				911422237
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-142648
		FILM NUMBER:		071276252

	BUSINESS ADDRESS:	
		STREET 1:		1102 BROADWAY PLAZA
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402
		BUSINESS PHONE:		2533051900

	MAIL ADDRESS:	
		STREET 1:		1102 BROADWAY PLAZA
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2007-11-29</finalEffectivenessDispDate>
        <accessionNumber>0001193125-07-223782</accessionNumber>
        <submissionType>POS AM</submissionType>
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            <cik>0000887343</cik>
            <entityName>COLUMBIA BANKING SYSTEM INC</entityName>
            <fileNumber>333-142648</fileNumber>
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