Ofallon Post Office

Post office

401 Church Street, Ofallon, MO 63366

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 Ofallon Facilities in Missouri

Ofallon Post Office accepts new U.S. passport applications in person in Ofallon, MO. First-time and child visits are booked on the USPS scheduler. Search ZIP 63366. How to apply · How to renew