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<ACCEPTANCE-DATETIME>20240508173423
ACCESSION NUMBER:		0000887343-24-000187
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20240508
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Submission of Matters to a Vote of Security Holders
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20240509
DATE AS OF CHANGE:		20240508

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA BANKING SYSTEM, INC.
		CENTRAL INDEX KEY:			0000887343
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				911422237
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20288
		FILM NUMBER:		24927701

	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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLUMBIA BANKING SYSTEM INC
		DATE OF NAME CHANGE:	19930328
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Document 1 - file: colb-20240508.htm

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<TYPE>EX-10.1
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<FILENAME>ex101-2024equityincentivep.htm
<DESCRIPTION>2024 EQUITY INCENTIVE PLAN
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Document 2 - file: ex101-2024equityincentivep.htm

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<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>ex102-formofrestrictedstoc.htm
<DESCRIPTION>FORM OF RESTRICTED STOCK AWARD AGREEMENT UNDER THE 2024 EQUITY INCENTIVE PLAN
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Document 3 - file: ex102-formofrestrictedstoc.htm

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<SEQUENCE>4
<FILENAME>ex103-formofrestrictedstoc.htm
<DESCRIPTION>FORM OF RESTRICTED STOCK UNIT AGREEMENT UNDER 2024 EQUITY INCENTIVE PLAN
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Document 4 - file: ex103-formofrestrictedstoc.htm

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<FILENAME>ex104-formofperformancesto.htm
<DESCRIPTION>FORM OF PERFORMANCE STOCK UNIT AGREEMENT-ROTCE UNDER 2024 EQUITY INCENTIVE PLAN
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Document 5 - file: ex104-formofperformancesto.htm

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<FILENAME>ex105-formofperformancesto.htm
<DESCRIPTION>FORM OF PERFORMANCE STOCK UNIT AGREEMENT-TSR UNDER 2024 EQUITY INCENTIVE PLAN
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<FILENAME>ex106-secondamendmenttothe.htm
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