<SEC-DOCUMENT>0001193125-15-075110-index.html : 20150303
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<ACCEPTANCE-DATETIME>20150303161941
ACCESSION NUMBER:		0001193125-15-075110
CONFORMED SUBMISSION TYPE:	PRE 14A
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20150422
FILED AS OF DATE:		20150303
DATE AS OF CHANGE:		20150303

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:		PRE 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20288
		FILM NUMBER:		15669352

	BUSINESS ADDRESS:	
		STREET 1:		1301 A STREET
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402
		BUSINESS PHONE:		2533051900

	MAIL ADDRESS:	
		STREET 1:		1301 A STREET
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402
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Document 1 - file: d882416dpre14a.htm

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Document 9 - file: g882416g19y70.jpg

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Document 13 - file: g882416g65j17.jpg

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Document 14 - file: g882416g74x17.jpg

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Document 19 - file: g882416g97m20.jpg

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