Columbia Banking System, Inc. operates as the bank holding company for Columbia State Bank that provides a range of banking services to small and medium-sized businesses, professionals, and individuals in Washington, Oregon, and Idaho. It offers personal banking products and services, including non-interest and interest-bearing checking, savings, money market, and certificate of deposit accounts; home mortgages for purchases and refinances, home equity loans and lines of credit, and other personal loans; debit and credit cards; and digital banking services. The company also provides business banking products and services, such as checking, savings, interest-bearing money market, and certificate of deposit accounts; agricultural, asset-based, builder and other commercial real estate loans, as well as loans guaranteed by the small business administration; debit and credit cards; and professional banking, treasury management, merchant card, and international banking services. In addition, it offers wealth management solutions that include financial planning services, such as asset allocation, net worth analysis, estate planning and preservation, education funding, and wealth transfer; insurance solutions, which include long-term care, and life and disability insurance; individual retirement solutions comprising retirement planning, retirement income strategies, and traditional and roth individual retirement accounts; and business solutions, which comprise business retirement plans, key person insurance, business succession planning, and deferred compensation plans to individuals, families, and professional businesses. Further, the company provides fiduciary, investment, and administrative trust services, such as personal and special needs trusts, estate settlement services, and investment agency and charitable management services. As of December 31, 2020, it operated approximately 145 branches. The company was founded in 1993 and is headquartered in Tacoma, Washington.