Saint Charles zipcode
| City | Saint Charles |
| ZIP Code | 63303 |
| Type | Standard |
| State Code | MO |
| State | Missouri |
ZIP code of Saint Charles is 63303. This place is located in Missouri state in US. To send any postal service to Saint Charles, you must use 63303 zipcode.
The ZIP code 63303 is also used with 1 more city name of Missouri.
- Saint Peters, MO
You should avoid following 2 city names of Missouri to be used with the ZIP code 63303.
- Harvester, MO
- St Peters, MO