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 combined company conducts banking operations under the Umpqua Bank name and brand.