Columbia Bank: The Leading Regional Bank of the Western U.S.

Our Profile: Consolidated Strength and Western Reach

Columbia Bank is the banking subsidiary of Columbia Banking System, Inc.⁴ (NASDAQ: COLB).⁵ The bank has a long history in the Pacific Northwest, but its current form is the result of major consolidation, including the acquisition of Umpqua Bank (in 2023) and most recently, the acquisition of Pacific Premier Bancorp (completed September 2025).⁶ The unified entity operates entirely under the Columbia Bank brand.⁷

Headquartered in Tacoma, Washington, Columbia Bank is now the largest bank headquartered in the Northwest and one of the largest regional banks in the West.⁸ It has approximately $70 billion in assets and operates over 350 locations across eight western states: Washington, Oregon, California, Arizona, Colorado, Idaho, Nevada, and Utah.⁹

Core Business Segments and Specialized Expertise

Columbia Bank provides a diversified and comprehensive suite of financial services, balancing retail banking with sophisticated commercial and wealth solutions:¹⁰

Commercial Banking: The central focus, offering extensive commercial and industrial (C&I) lending, equipment leasing, specialized Commercial Real Estate (CRE) financing, and advanced Treasury Management solutions for businesses of all sizes.
Institutional and Corporate Banking: Serves larger corporations, non-profits, and institutional clients, including specialized national verticals such as Homeowners Association (HOA) Banking and Custodial Trust services (inherited from Pacific Premier Bank).¹¹
Consumer (Retail) Banking: Provides a full range of products, including checking, savings, mortgages, and consumer loans, delivered through its widespread branch network and digital platforms.¹²
Wealth Management: Offers comprehensive services through Columbia Wealth Management, including private banking, trust services, and investment advisory for affluent clients and institutions.¹³

The Columbia Bank Distinction

Columbia Bank’s competitive advantage is its unparalleled geographic scale and market density in the Western U.S., allowing it to provide the resources and sophistication of a national bank while maintaining a localized, relationship-based service model. The bank is committed to being a strong, stable financial partner across its communities.

Corporate Contact Information: Columbia Bank (Headquarters)

The table below provides the essential contact details for the headquarters of Columbia Bank. The bank’s SWIFT code is often routed through its correspondent bank, or is provided as a unique code depending on the receiving system.

Name	COLUMBIA BANK (Columbia Banking System, Inc.)
Address (Corporate HQ)	1301 A Street, Tacoma, WA 98402, USA.
Tel (General Customer Service)	+1 (877) 279-3732 (Toll-Free)
Tel (Corporate Directory)	+1 (253) 305-1900
SWIFT Code (Primary)	UMPQUS6P
Note on Transition	The full system conversion for the Pacific Premier acquisition is scheduled for January 2026. Until then, routing numbers and checks may remain as they were, but the bank is operating under the unified Columbia Bank brand.