TTCU is one of the largest credit unions in Oklahoma serving more than 78,000 members. We are pleased to offer the benefits of credit union membership to school teachers, employees, students and their families of most Northeastern Oklahoma counties. For complete membership eligibility and information, please visit our membership page. Established in 1934, TTCU is an over $650 million financial institution offering a full complement of products and services. We pride ourselves on offering great rates and service to our membership. As a non-profit organization, our financial success is returned to our members in the form of low-rate loans and high-rate savings accounts.