| Place Name | Jefferson (Jefferson County) |
| Place Type | Town |
| ZIP Code(s) | 53137 53538 53549 |
| County | Jefferson County |
| Area Code(s) | 274,920,262 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 1,967 |
| Majority Ethnicity | White 92.02% |
| Metro/Micro Stats Area | Watertown-Fort Atkinson, WI |
| US Congressional District(s) | Wisconsin 5th |
| State Assembly Districts | 33 |
| State Senate Districts | 11 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.02% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 2.77% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.2% |