Mackinaw Post Office

Post office

110 S Main Street, Mackinaw, IL 61755

(309) 359-6431

Appointments only. Call 309-359-6431

Appointment required

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

Book at USPS Directions Facilities in Mackinaw Facilities in Illinois

Mackinaw Post Office accepts new U.S. passport applications in person in Mackinaw, IL. First-time and child visits are booked on the USPS scheduler. Search ZIP 61755. How to apply · How to renew