    <SEC-DOCUMENT>0001140361-22-010103-index.html : 20220318
    <SEC-HEADER>0001140361-22-010103.hdr.sgml : 20220318
    <ACCEPTANCE-DATETIME>20220318151528
    ACCESSION NUMBER:		0001140361-22-010103
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		24
    CONFORMED PERIOD OF REPORT:	20220427
    FILED AS OF DATE:		20220318
    DATE AS OF CHANGE:		20220318

    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:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-20288
    		FILM NUMBER:		22752225

    	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
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>ny20002429x1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: ny20002429x1_def14a.htm

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    <TYPE>GRAPHIC
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    <FILENAME>logo_columbiabankingx1.jpg
    <TEXT>
    Document 2 - file: logo_columbiabankingx1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>ny20002429x1_chart01x2.jpg
    <TEXT>
    Document 3 - file: ny20002429x1_chart01x2.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20002429x1_clintstein.jpg
    <TEXT>
    Document 4 - file: ny20002429x1_clintstein.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ny20002429x1_craigeerkes.jpg
    <TEXT>
    Document 5 - file: ny20002429x1_craigeerkes.jpg

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    <SEQUENCE>6
    <FILENAME>ny20002429x1_elizabethseaton.jpg
    <TEXT>
    Document 6 - file: ny20002429x1_elizabethseaton.jpg

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    <FILENAME>ny20002429x1_ericforrest.jpg
    <TEXT>
    Document 7 - file: ny20002429x1_ericforrest.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ny20002429x1_fordelsaesser.jpg
    <TEXT>
    Document 8 - file: ny20002429x1_fordelsaesser.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ny20002429x1_graphic01x1.jpg
    <TEXT>
    Document 9 - file: ny20002429x1_graphic01x1.jpg

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    <SEQUENCE>10
    <FILENAME>ny20002429x1_internetx1.jpg
    <TEXT>
    Document 10 - file: ny20002429x1_internetx1.jpg

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    <DOCUMENT>
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    <SEQUENCE>11
    <FILENAME>ny20002429x1_janineterrano.jpg
    <TEXT>
    Document 11 - file: ny20002429x1_janineterrano.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>ny20002429x1_lauraschrag.jpg
    <TEXT>
    Document 12 - file: ny20002429x1_lauraschrag.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>ny20002429x1_mail.jpg
    <TEXT>
    Document 13 - file: ny20002429x1_mail.jpg

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    <SEQUENCE>14
    <FILENAME>ny20002429x1_markfinkelstein.jpg
    <TEXT>
    Document 14 - file: ny20002429x1_markfinkelstein.jpg

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    <DOCUMENT>
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    <SEQUENCE>15
    <FILENAME>ny20002429x1_michellelantow.jpg
    <TEXT>
    Document 15 - file: ny20002429x1_michellelantow.jpg

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    <FILENAME>ny20002429x1_pc1.jpg
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    Document 16 - file: ny20002429x1_pc1.jpg

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    <SEQUENCE>17
    <FILENAME>ny20002429x1_pc2.jpg
    <TEXT>
    Document 17 - file: ny20002429x1_pc2.jpg

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    <SEQUENCE>18
    <FILENAME>ny20002429x1_phonex1.jpg
    <TEXT>
    Document 18 - file: ny20002429x1_phonex1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>ny20002429x1_randallund.jpg
    <TEXT>
    Document 19 - file: ny20002429x1_randallund.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>ny20002429x1_smaenumata.jpg
    <TEXT>
    Document 20 - file: ny20002429x1_smaenumata.jpg

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    <SEQUENCE>21
    <FILENAME>ny20002429x1_tracymackaskew.jpg
    <TEXT>
    Document 21 - file: ny20002429x1_tracymackaskew.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>sig_clintstein.jpg
    <TEXT>
    Document 22 - file: sig_clintstein.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>sig_craigeerkes.jpg
    <TEXT>
    Document 23 - file: sig_craigeerkes.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>sig_kumibaruffi.jpg
    <TEXT>
    Document 24 - file: sig_kumibaruffi.jpg

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    </SEC-DOCUMENT>