Post Offices

Post Offices in & near Alton, Illinois. Operating hours, locations, phone/fax number, services information.

Upper Alton Post Office

Upper Alton Post Office in Alton, Illinois on Main St. Operating hours, phone number, services information, and other locations.

Address: 1624 Main St, Alton, IL 62002
Phone: 618-462-6014
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 8:30am - 5:30pm
Tuesday 8:30am - 5:30pm
Wednesday 8:30am - 5:30pm
Thursday 8:30am - 5:30pm
Friday 8:30am - 5:30pm
Saturday 9:00am - 2:00pm
Sunday Closed

Lobby Hours

Monday 8:30am - 6:00pm
Tuesday 8:30am - 6:00pm
Wednesday 8:30am - 6:00pm
Thursday 8:30am - 6:00pm
Friday 8:30am - 6:00pm
Saturday 9:00am - 3:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 12:00pm
Sunday Closed