United States Postal Service
Main:
(800) 275-8777
Alt: (636) 272-3811
Fax: (651) 456-6627
Alt: (636) 272-3811
Fax: (651) 456-6627
401 Church St, O'fallon, Missouri, 63366
Business hours
| Monday | 8:30am to 6:00pm |
| Tuesday | 8:30am to 6:00pm |
| Wednesday | 8:30am to 6:00pm |
| Thursday | 8:30am to 6:00pm |
| Friday | 8:30am to 6:00pm |
| Saturday | 9:00am to 2:00pm |
| Sunday | - |
About us
Visit your local Post Office™ at 401 Church 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
USPS is hiring! See openings for top jobs.