Montclair Post Office

Post office

5186 Benito Street, Montclair, CA 91763

(909) 624-5438

Hours: Monday-Friday_10am-3pm. Saturday_10am-1pm. Please call (909)624-5438 for more information.

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

Book at USPS Directions Facilities in Montclair Facilities in California

Montclair Post Office accepts new U.S. passport applications in person in Montclair, CA. First-time and child visits are booked on the USPS scheduler. Search ZIP 91763. How to apply · How to renew