Our field of membership has widened significantly in recent years. If you are a member of any of the following groups you are eligible. Residents of Taylor and Callahan counties. Persons who work, attend school or worship in these counties but reside elsewhere are also eligible. Immediate family members or household members of current ATFCU members. Immediate family members or household members of persons who are eligible for membership, even if the eligible member has chosen not to join the credit union. Employees of public school systems in the following Texas counties: Callahan Coleman Eastland Fisher Haskell Jones Kent King Knox Nolan* Runnels Shackelford Stephens Stonewall Taylor Throckmorton