Post Offices
Post Offices in & near North Ontario, California. Operating hours, locations, phone/fax number, services information.
Upland Post Office
Post Office in Upland, California on E Arrow Hwy. Operating hours, phone number, services information, and other locations.
Address: 333 E Arrow Hwy, Upland, CA 91785
Phone: 909-946-8134
Fax: 909-981-9724
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Retail Hours
Monday 8:30am - 5:00pmTuesday 8:30am - 5:00pm
Wednesday 8:30am - 5:00pm
Thursday 8:30am - 5:00pm
Friday 8:30am - 5:00pm
Saturday 9:00am - 2:00pm
Sunday Closed
Lobby Hours
Monday 5:00pmTuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 9:00am
Sunday Closed
Last Collection Times
Monday 9:00am - 3:00pmTuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday Closed
Sunday Closed
Plaza Center Post Office
Address: 1126 N Mountain Ave, Ontario, CA 91762
Phone: 909-933-3837
Fax: 909-391-3243
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Downtown Ontar Post Office
Address: 123 W Holt Blvd, Ontario, CA 91762
Phone: 909-933-3837
Fax: 909-391-0595
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Montclair Post Office
Address: 5186 Benito St, Montclair, CA 91763
Phone: 909-624-5438
Fax: 909-626-8096
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Ontar Post Office
Address: 1555 E Holt Blvd, Ontario, CA 91761
Phone: 909-933-3837
Fax: 909-988-4023
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Claremon Post Office
Address: 140 Harvard Ave, Claremont, CA 91711
Phone: 909-625-7161
Fax: 909-624-7517
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457