Thurston County Teachers Credit Union was founded in 1938 by a group of respected Olympia school teachers and community leaders seeking better loan and savings rates than were generally available during the tough post-Depression era. In 1981 the credit union name was changed to Twin County Credit Union to reflect the growth and expansion of the credit union into Grays Harbor County. Since then, the credit union has expanded to more than 20 branches in western Washington and two branches in Oregon. In 2006, Twin County Credit Union changed its name to TwinStar Credit Union to better reflect our growing and diversified member base. Then, in 2009, TwinStar expanded its field of membership to include all residents in the state of Washington and in 2011 expanded again to add the Portland, Oregon metropolitan area including anyone who lives or works in Multnomah, Washington, Clackamas or Marion counties. We operate a wide and convenient branch network! Find a branch near your home or workplace or join online today.