Post Office in Alton, IL

Find The Office You Need

• Alton Square Post Office

  117 Alton Square, Alton, IL 62002

  618-463-4728
• Upper Alton Post Office

  1624 Main Street, Alton, IL 62002

  618-462-6014
• Alton Post Office

  727 Belle Street, Alton, IL 62002

  618-462-2501
• Foster Post Office

  203 Main Street, Alton, IL 62002

  660-832-4823