Barnwell Post Office

Post office

221 Main St, Barnwell, SC 29812

(803) 259-3195

Appointments are required

Appointment required

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

Book at USPS Directions Facilities in Barnwell Facilities in South Carolina

Barnwell Post Office accepts new U.S. passport applications in person in Barnwell, SC. First-time and child visits are booked on the USPS scheduler. Search ZIP 29812. How to apply · How to renew