Duncan Post Office

Post office

131 W Main St, Duncan, SC 29334

(864) 439-3920

Appointments are required.

Appointment required

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

Book at USPS Directions Facilities in Duncan Facilities in South Carolina

Duncan Post Office accepts new U.S. passport applications in person in Duncan, SC. First-time and child visits are booked on the USPS scheduler. Search ZIP 29334. How to apply · How to renew