| County Name | Jefferson County |
| FIPS Code | 55055 |
| Population | 83686 |
| Unemployment Rate | 3.8% |
| Time Zone: | Central Standard Time |
List of All Zipcodes in Jefferson County, Wisconsin | |||||||
|---|---|---|---|---|---|---|---|
| ZIP Code | ZIP Code Name | Population | ZIP Type | ||||
| Ixonia | 2720 | Non-Unique | ||||
| Johnson Creek | 4013 | Non-Unique | ||||
| Oconomowoc | 33830 | Non-Unique | ||||
| Watertown | 19169 | Non-Unique | ||||
| Watertown | 11965 | Non-Unique | ||||
| Dousman | 7202 | Non-Unique | ||||
| Eagle | 5608 | Non-Unique | ||||
| Helenville | 1702 | Non-Unique | ||||
| Palmyra | 2992 | Non-Unique | ||||
| Sullivan | 2626 | Non-Unique | ||||
| Cambridge | 4949 | Non-Unique | ||||
| Fort Atkinson | 18468 | Non-Unique | ||||
| Jefferson | 10414 | Non-Unique | ||||
| Lake Mills | 8273 | Non-Unique | ||||
| Marshall | 6063 | Non-Unique | ||||
| Milton | 10728 | Non-Unique | ||||
| Waterloo | 5144 | Non-Unique | ||||
| List of Counties that Border Jefferson County, Wisconsin |
|---|
| Dane, WI |
| Dodge, WI |
| Jefferson, WI |
| Rock, WI |
| Walworth, WI |
| Waukesha, WI |