Headquartered in Mountlake Terrace, Washington, 1st Security Bank has been serving customers in King, Kitsap, Pierce, Snohomish, Jefferson, Clallam, Thurston, Lewis and Grays Harbor counties since 1936. With our 21 neighborhood branches, we believe that bigger is not necessarily better. In fact, our strength comes from the relationships that we build with our customers, small businesses, and community partners.
