Usps Arnold Post Office

Post office

1521 Ritchie Highway, Arnold, MD 21012

(410) 757-8802

By Appointment only Mon-Fri 10:30AM-3:00PM Sat 1:00PM-2:30PM

Appointment required

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

Book at USPS Directions Facilities in Arnold Facilities in Maryland

Usps Arnold Post Office accepts new U.S. passport applications in person in Arnold, MD. First-time and child visits are booked on the USPS scheduler. Search ZIP 21012. How to apply · How to renew