Hart Post Office

Post office

135 S. State Street, Hart, MI 49420

Please call for an appointment at 231-873-2850. Hours are M-F 9am to 4pm/Sat 9:30am to 10:30am.

Appointment required

Hours and addresses come from the State Department listing, updated November 2, 2026.

Book at USPS Directions Facilities in Hart Facilities in Michigan

Hart Post Office accepts new U.S. passport applications in person in Hart, MI. First-time and child visits are booked on the USPS scheduler. Search ZIP 49420. How to apply · How to renew