Courts Directory | State of Illinois Office of the Illinois Courts Williamson County Courthouse Circuit District: 5 | Circuit: 1stWilliamson County 200 West Jefferson Street, Suite 260Marion, IL - Illinois 62959 (618) 997-1301 Visit Website Get Directions Links 1st Judicial Circuit Rules Drug and Veteran's Court Self Represented Litigant Resources Williamson County Directory Resources Court Disability Coordinator Carey Simmons, Circuit Clerk - 1st Judicial Circuit, (618) 734-0107 Alexcocls19@gmail.com