Marathon Post Office

Post office

311 Walnut St., Marathon, WI 54448

(715) 443-2026

For Appointment Call 715-443-2026

Appointment required

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

Book at USPS Directions Facilities in Marathon Facilities in Wisconsin

Marathon Post Office accepts new U.S. passport applications in person in Marathon, WI. First-time and child visits are booked on the USPS scheduler. Search ZIP 54448. How to apply · How to renew