Jefferson County Wisconsin is covered by a total of 18 ZIP Codes. There are 11 ZIP Codes in Jefferson County that extend into adjacent counties (Dane County, Dodge County, Rock County, Walworth County, and Waukesha County). Of the ZIP codes within or partially within Jefferson County there are 18 Standard 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 | |||
|---|---|---|---|---|---|
| Ixonia | Standard | |||
| Johnson Creek | Standard | |||
| Oconomowoc | Standard | |||
| Watertown | Standard | |||
| Dousman | Standard | |||
| Eagle | Standard | |||
| Helenville | Standard | |||
| Palmyra | Standard | |||
| Sullivan | Standard | |||
| Whitewater | Standard | |||
| Cambridge | Standard | |||
| Edgerton | Standard | |||
| Fort Atkinson | Standard | |||
| Jefferson | Standard | |||
| Lake Mills | Standard | |||
| Marshall | Standard | |||
| Milton | Standard | |||
| Waterloo | Standard |