Post Offices in & near Constantine, Michigan. Operating hours, locations, phone/fax number, services information.
Post Office in Constantine, Michigan on S Washington St. Operating hours, phone number, services information, and other locations.
Address: 340 S Washington St, Constantine, MI 49042
Phone: 269-435-5285
Fax: 269-435-6206
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
