O’Fallon

ZIP Code(s): 62269; County(s): St. Clair;

Collinsville

ZIP Code(s): 62234; County(s): Madison, St. Clair;

Dupo

ZIP Code(s): 62240, 62236, 62239; County(s): St. Clair;

Centreville

ZIP Code(s): 62207, 62205, 62203; County(s): St. Clair;

Swansea

ZIP Code(s): 62226; County(s): St. Clair;

Osceola

ZIP Code(s): 64776; County(s): St. Clair;

Trussville

ZIP Code(s): 35235, 35173; County(s): Jefferson, St. Clair;

Leeds

ZIP Code(s): 35094, 35173; County(s): Jefferson, St. Clair, Shelby;

New Athens

ZIP Code(s): 62264; County(s): St. Clair;

Memphis

ZIP Code(s): 48041; County(s): Macomb, St. Clair;

Marissa

ZIP Code(s): 62257; County(s): St. Clair;

Capac

ZIP Code(s): 48014; County(s): St. Clair;

East St. Louis

ZIP Code(s): 62207, 62205, 62204, 62203, 62201, 62202; County(s): St. Clair;

Ashville

ZIP Code(s): 35953, 35987; County(s): St. Clair;

Madison

ZIP Code(s): 62040, 62201, 62060; County(s): Madison, St. Clair;

Alorton

ZIP Code(s): 62207, 62205; County(s): St. Clair;

Marine City

ZIP Code(s): 48039; County(s): St. Clair;

Port Huron

ZIP Code(s): 48060, 48061; County(s): St. Clair;

Millstadt

ZIP Code(s): 62260; County(s): St. Clair;

Argo

ZIP Code(s): 35173, 35120; County(s): Jefferson, St. Clair;