United States Postal Service
Main:
(800) 275-8777
Alt: (660) 768-5612
Alt: (660) 768-5612
109 Market St, Callao, Missouri, 63534
Business hours
| Monday | 7:30am to 11:30am |
| Tuesday | 7:30am to 11:30am |
| Wednesday | 7:30am to 11:30am |
| Thursday | 7:30am to 11:30am |
| Friday | 7:30am to 11:30am |
| Saturday | 7:30am to 8:30am |
| Sunday | - |
About us
Visit your local Post Office™ at 109 Market 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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