Mt Vernon Il Post Office

Post office

726 Park Plaza, Mount Vernon, IL 62864

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 Mount Vernon Facilities in Illinois

Mt Vernon Il Post Office accepts new U.S. passport applications in person in Mount Vernon, IL. First-time and child visits are booked on the USPS scheduler. Search ZIP 62864. How to apply · How to renew