Explore ZIP codes in St. Clair, Illinois. This city has 30 unique ZIP Codes. Find the ZIP code for any area in St. Clair.
Belleville
Caseyville
Dupo
East Carondelet
East Saint Louis
Fairview Heights
Freeburg
Lebanon
Lenzburg
Lovejoy
Marissa
Mascoutah
Millstadt
National Stock Yards
New Athens
O Fallon
Saint Libory
Scott Air Force Base
Smithton
Summerfield