Usps Diamond Farms Post Office

Post office

23 Firstfield Road, Gaithersburg, MD 20878

(301) 208-3735

By Appointment Only. Monday - Friday 10:00am - 2:45pm

Appointment required

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

Book at USPS Directions Facilities in Gaithersburg Facilities in Maryland

Usps Diamond Farms Post Office accepts new U.S. passport applications in person in Gaithersburg, MD. First-time and child visits are booked on the USPS scheduler. Search ZIP 20878. How to apply · How to renew

Other facilities in Gaithersburg

City Of Gaithersburg Usps Gaithersburg Post Office Usps Montgomery Village Post Office