Jefferson County Missouri is covered by a total of 26 ZIP Codes. There are 11 ZIP Codes in Jefferson County that extend into adjacent counties (Franklin County, Saint Francois County, Saint Louis County, Ste Genevieve County, and Washington County). Of the ZIP codes within or partially within Jefferson County there are 21 Standard ZIP Codes and 5 PO Box ZIP Codes.
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 Jefferson County 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 | |||
|---|---|---|---|---|---|
| Arnold | Standard | |||
| Barnhart | Standard | |||
| Catawissa | Standard | |||
| Cedar Hill | Standard | |||
| Crystal City | Standard | |||
| De Soto | Standard | |||
| Dittmer | Standard | |||
| Eureka | Standard | |||
| Fenton | Standard | |||
| Festus | Standard | |||
| Fletcher | Standard | |||
| Grubville | Standard | |||
| Hematite | PO Box | |||
| Herculaneum | Standard | |||
| High Ridge | Standard | |||
| Hillsboro | Standard | |||
| House Springs | Standard | |||
| Imperial | Standard | |||
| Kimmswick | PO Box | |||
| Liguori | PO Box | |||
| Mapaville | PO Box | |||
| Morse Mill | PO Box | |||
| Pacific | Standard | |||
| Pevely | Standard | |||
| Robertsville | Standard | |||
| Bloomsdale | Standard |