O'Fallon Missouri is covered by a total of 2 ZIP Codes. There are also 3 ZIP Codes that overlap O'Fallon but have a different postal city name. The ZIP Codes in O'Fallon range from 63304 to 63376. Of the ZIP codes within or partially within O'Fallon there are 2 Standard ZIP Codes. The total population of ZIP Codes in O'Fallon is 98870.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of O'Fallon and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Saint Charles | Standard | |||
| O'Fallon | Standard | |||
| Lake Saint Louis | Standard | |||
| O'Fallon | Standard | |||
| Saint Peters | Standard |