Post Offices
Post Offices in & near O'Fallon, Illinois. Operating hours, locations, phone/fax number, services information.
O Fallon Post Office
Post Office in O Fallon, Illinois on S Lincoln Ave. Operating hours, phone number, services information, and other locations.
Address: 1111 S Lincoln Ave, O Fallon, IL 62269
Phone: 618-632-4691
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Retail Hours
Monday 8:30am - 7:00pmTuesday 8:30am - 7:00pm
Wednesday 8:30am - 7:00pm
Thursday 8:30am - 7:00pm
Friday 8:30am - 7:00pm
Saturday 9:00am - 4:00pm
Sunday Closed
Lobby Hours
Monday 4:45pmTuesday 4:45pm
Wednesday 4:45pm
Thursday 4:45pm
Friday 4:45pm
Saturday 3:00pm
Sunday Closed
Last Collection Times
Monday 9:00am - 2:00pmTuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday Closed
Sunday Closed