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United States Postal Service
Main:
(800) 275-8777
Alt: (909) 933-3837
Fax: (909) 391-3243
Alt: (909) 933-3837
Fax: (909) 391-3243
1126 N Mountain Ave, Ontario, California, 91762
Business hours
| Monday | 8:30am to 5:00pm |
| Tuesday | 8:30am to 5:00pm |
| Wednesday | 8:30am to 5:00pm |
| Thursday | 8:30am to 5:00pm |
| Friday | 8:30am to 5:00pm |
| Saturday | - |
| Sunday | - |
About us
Visit your local Post Office™ at 1126 N Mountain Ave to find everything you need to send mail and ship packages. Explore our other products and services like money orders, Post Office™ boxes, passports, gift cards, and more
USPS is hiring! See openings for top jobs.
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