United States Postal Service
Main:
(800) 275-8777
Alt: (510) 471-1180
Fax: (510) 471-0306
Alt: (510) 471-1180
Fax: (510) 471-0306
3861 Smith St, Union City, California, 94587
Business hours
| Monday | 9:30am to 1:00pm , 2:00pm to 4:30pm |
| Tuesday | 9:30am to 1:00pm , 2:00pm to 4:30pm |
| Wednesday | 9:30am to 1:00pm , 2:00pm to 4:30pm |
| Thursday | 9:30am to 1:00pm , 2:00pm to 4:30pm |
| Friday | 9:30am to 1:00pm , 2:00pm to 4:30pm |
| Saturday | - |
| Sunday | - |
About us
Visit your local Post Office™ at 3861 Smith St 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
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