Columbia Bank Columbia Bank is a Washington state-chartered full service commercial bank with 18 banking offices in Pierce, King and Cowlitz counties. The cornerstone of Columbia's approach to banking is a return to friendly old-fashioned service, coupled with modern convenience and technology. Columbia Bank is a local bank, strongly committed to its customers and the communities it serves. Columbia Bank is the sole subsidiary of Columbia Banking System, Inc., a Tacoma, Washington based bank holding company.

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