South Plainfield Post Office

Post office

114 Oak Tree Avenue, South Plainfield, NJ 07080

(908) 756-2432

Please call for an appointment at 908-756-2432. Hours are M-F 10:30am to 3:30pm/Sat 9am to 12pm.

Appointment required

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

Book at USPS Directions Facilities in South Plainfield Facilities in New Jersey

South Plainfield Post Office accepts new U.S. passport applications in person in South Plainfield, NJ. First-time and child visits are booked on the USPS scheduler. Search ZIP 07080. How to apply · How to renew