<SEC-DOCUMENT>0000887343-17-000116-index.html : 20170630
<SEC-HEADER>0000887343-17-000116.hdr.sgml : 20170630
<ACCEPTANCE-DATETIME>20170630165650
ACCESSION NUMBER:		0000887343-17-000116
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170628
FILED AS OF DATE:		20170630
DATE AS OF CHANGE:		20170630

ISSUER:		

	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

	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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lantow Michelle
		CENTRAL INDEX KEY:			0001480001

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20288
		FILM NUMBER:		17942889

	MAIL ADDRESS:	
		STREET 1:		720 SW WASHINGTON STREET, SUITE 550
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97205
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_149885619546906.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_149885619546906.html

Document 1 - RAW XML: wf-form4_149885619546906.xml

</DOCUMENT>
</SEC-DOCUMENT>