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US Post Office
One of 3 shipping or delivery service listings in O'Fallon.
About US Post Office
US Post Office is a shipping or delivery service in the public service and government sector, based in O'Fallon, MO. Its recorded address is 401 Church St, 63366. The listing includes a telephone number, an official website. It is one of 3 shipping or delivery service listings tracked in O'Fallon; the nearest comparable listing is United States Postal Service, within walking distance in O Fallon. US Post Office has 7,292 listed locations in total; this page covers the O'Fallon branch.
- Address
- 401 Church St, O'Fallon, MO, 63366
- Phone
- (800) 275-8777
- Website
- tools.usps.com
- Social
Questions
Where is US Post Office located?
401 Church St, O'Fallon, MO, 63366
How do I contact US Post Office?
(800) 275-8777 · https://tools.usps.com/find-location.htm?location=1375691
What type of business is US Post Office?
US Post Office is a shipping or delivery service (public service and government) in O'Fallon.
US Post Office branches
US Post Office has 7,292 listed locations. This branch is in O'Fallon.
- Kailua Kona96740-2440
- Hilo96720
- Hilo96720
- Laupahoehoe96764-9997
- Kapaau96755-3001
- Kihei96753
- Lanai City96763
- Pukalani96788
- Lahaina96761
- Honolulu96817
Nearby shipping or delivery service
- United States Postal ServiceO Fallon0.0 km
- O FALLONO FALLON0.0 km
- Ofallon Post OfficeO'Fallon0.0 km
- USPSO'Fallon0.1 km
- UPS Access Point locationO FALLON1.1 km
- FedEx Office Print & Ship CenterO Fallon1.8 km
- FedEx ShipSiteO Fallon1.8 km
- UPS Access Point locationO FALLON1.9 km
- UPS Access Point locationO Fallon3.5 km
- UPS Access Point locationO FALLON4.9 km
- PSP, etc.O Fallon5.4 km
- The UPS StoreSt Peters4.3 km
- The UPS StoreOfallon5.7 km
- UPS Access Point locationO FALLON5.9 km
- ALPLASt. Peters4.9 km
Cite this page
“US Post Office, O'Fallon — business.wiki, retrieved August 2026.” Facts on this page come from openly licensed data (Overture Maps Foundation) and are refreshed with each monthly release; sourcing is documented on the methodology page.