O Fallon zipcode
| City | O Fallon |
| ZIP Code | 63366 |
| Type | Standard |
| State Code | MO |
| State | Missouri |
ZIP code of O Fallon is 63366. This place is located in Missouri state in US. To send any postal service to O Fallon, you must use 63366 zipcode.
The ZIP code 63366 is also used with 5 more city names of Missouri.
- Cottleville, MO
- Dardenne Pr, MO
- Dardenne Prairie, MO
- Saint Paul, MO
- Saint Peters, MO
You should avoid following 3 city names of Missouri to be used with the ZIP code 63366.
- Dardenne, MO
- Ofallon, MO
- St Peters, MO