Montclair Main Office
5186 Benito Street
Montclair, CA 91763

Regular Business Hours:
Week Days - 8:30 a.m. to 5:00 p.m.
Saturday - 9:00 a.m. to 1:00 p.m.
Sunday - closed

Latest Collection at Post Office:
Weekdays - 5:30 p.m.
Saturday - 3:00 p.m.
Sunday - no collection

Phone:
(909) 624-5438
For TTY service for the hearing impaired only, (877) 877-7833

For additional post office locations visit their website at: http://www.usps.com/