Alvarado Post Office
3861 Smith St, Union City, CA 94587
Retail Hours
| Sunday | Closed |
| Monday | 9:30 AM - 4:30 PM |
| Tuesday | 9:30 AM - 4:30 PM |
| Wednesday | 9:30 AM - 4:30 PM |
| Thursday | 9:30 AM - 4:30 PM |
| Friday | 9:30 AM - 4:30 PM |
| Saturday | Closed |
Contact Info
| Phone | 510-471-1180 |
| Fax | 510-471-0306 |
| TTY | 877-889-2457 |
| Toll Free | 1-800-275-8777 (1-800-Ask-USPS®) |
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