Owosso Post Office

Post office

319 N Washington Street, Owosso, MI 48867

Hours are not published. Call before you go.

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

Book at USPS Directions Facilities in Owosso Facilities in Michigan

Owosso Post Office accepts new U.S. passport applications in person in Owosso, MI. First-time and child visits are booked on the USPS scheduler. Search ZIP 48867. How to apply · How to renew