TwinStar Credit Union is a state-chartered credit union base in Olympia, Washington founded in 1938. Membership in TwinStar Credit Union is open to those residing or working in Washington state and specific counties in Oregon. TwinStar Credit Union offers commercial loans, commercial deposit accounts, consumer and small business checking and savings accounts, certificates of deposit, individual retirement accounts, health savings accounts, credit cards, consumer loans, mortgages, financial planning, investment services, and insurance services.