Sterling Savings Bank

Sterling Savings Bank, based in Spokane, WA, was a state chartered and federally insured commercial bank. It was the largest commercial bank based in Washington state and one of the largest regional community banks in the western United States. The Bank provided personal and business banking services including checking accounts, personal and home loans, retirement and investment services, private banking, merchant services, treasury management and much more. It served over 220,000 customers through a network of more than 190 branches in Washington, Oregon, Idaho, Montana and Northern California. The Bank was established in 1981 and operated under the following registered trade names: Sterling Bank, First Independent Bank and Sonoma Bank (in California). Sterling Savings Bank operated as a subsidiary of Sterling Financial Corporation of Spokane (NASDAQ: STSA).

In April 2014, Sterling Financial Corporation completed the merger with Umpqua Holdings Corporation, creating the West Coast's largest community bank. The new company operated under the Umpqua Bank name.

Umpqua Holdings Corporation later combined with Columbia Banking System, Inc., and Columbia State Bank was merged into the surviving Umpqua Bank charter on March 1, 2023. The surviving bank's legal name was changed to Columbia Bank effective July 1, 2025, and it began serving customers under the Columbia Bank name on September 1, 2025, retiring the Umpqua Bank brand. Columbia Banking System announced the completion of its acquisition of Pacific Premier Bancorp on September 2, 2025. As of June 30, 2026, Columbia Bank reported total assets of $65.4 billion and 369 domestic offices.