Post Offices in & near Saint Peter, Illinois. Operating hours, locations, phone/fax number, services information.
Post Office in Saint Peter, Illinois on E 3rd St. Operating hours, phone number, services information, and other locations.
Address: 109 E 3rd St, Saint Peter, IL 62880
Phone: 618-349-6366
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
