Banner Corporation operates as the bank holding company for Banner Bank that provide commercial banking and financial products and services to individuals, businesses, and public sector entities in the United States.

It accepts various deposit instruments, including interest-bearing and non-interest-bearing checking accounts, money market deposit accounts, regular savings accounts, and certificates of deposit, as well as treasury management services and retirement savings plans.

The company also provides commercial real estate loans, including owner-occupied, investment properties, and multifamily residential real estate loans; construction, land, and land development loans; one- to four-family residential real estate lending; commercial business loans; agricultural loans; consumer and other loans, such as home equity lines of credit, automobile, and boat and recreational vehicle loans, as well as loans secured by deposit accounts; and small business administration loans.

In addition, it provides electronic and digital banking services. Banner Corporation was founded in 1890 and is based in Walla Walla, Washington.