Banner Bank, the primary subsidiary of Banner Corporation, is a Washington-chartered commercial bank headquartered in Walla Walla, Washington. Founded as the National Building Loan & Trust Association in 1890, it is the oldest savings and loan institution in Washington. Banner Bank has a network of 89 branch offices and seven loan production centers in 29 counties, throughout Washington, Oregon, and Idaho. The company offers Personal and Community Banking, Commercial Banking, and Real Estate Lending, among other financial services. A portion of the Banner Bank's construction and mortgage lending activities are conducted through its subsidiary, Community Financial Corporation, headquartered in Lake Oswego, Oregon. Banner Bank also has a sister company, Islanders Bank, also a Washington-chartered commercial bank located in San Juan County, Washington.