Addresses, Phone Numbers, and Business Hours for Post Offices in Alton, IL.
Alton Post Office Alton IL 727 Belle Street 62002 618-462-2501
Alton Square Post Office Alton IL 117 Alton Square 62002 618-463-4728
Foster Post Office Alton IL 203 Main Street 62002 660-832-4823
Upper Alton Post Office Alton IL 1624 Main Street 62002 618-462-6014