Williamstown Post Office

Post office

135 South Black Horse Pike, Williamstown, NJ 08094

Please call for an appointment at 856-728-7492. Hours are M-F 8:30am to 3pm/Sat 9am to 1pm.

Appointment required

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

Book at USPS Directions Facilities in Williamstown Facilities in New Jersey

Williamstown Post Office accepts new U.S. passport applications in person in Williamstown, NJ. First-time and child visits are booked on the USPS scheduler. Search ZIP 08094. How to apply · How to renew