Alton Square Post Office
117 Alton Sq, Alton, IL 62002
Retail Hours
| Sunday | Closed |
| Monday | 10:00 AM - 3:00 PM |
| Tuesday | 10:00 AM - 3:00 PM |
| Wednesday | 10:00 AM - 3:00 PM |
| Thursday | 10:00 AM - 3:00 PM |
| Friday | 10:00 AM - 3:00 PM |
| Saturday | 10:00 AM - 12:00 PM |
Contact Info
| Phone | 618-463-4728 |
| Fax | |
| TTY | 877-889-2457 |
| Toll Free | 1-800-275-8777 (1-800-Ask-USPS®) |
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