St Clair Post Office

Post office

202 Trumbull Street, St. Clair, MI 48079

Please call for an appointment at (810) 329-4555. Hours are M-F 10am to 3pm/Sat 10am to 12pm.

Appointment required

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

Book at USPS Directions Facilities in St. Clair Facilities in Michigan

St Clair Post Office accepts new U.S. passport applications in person in St. Clair, MI. First-time and child visits are booked on the USPS scheduler. Search ZIP 48079. How to apply · How to renew