| Name | Jefferson County |
| State | Wisconsin |
| FIPS Code | 55055 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 83,751 |
| Population Growth Rate(2000-2022) | 1.45% |
| Majority Ethnicity | White 91.53% |
| Public School Majority Ethnicity | White 79% |
| Partisan Voting Index | Republican:+6 |
| Unemployment Rate | 3.2% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 91.53% |
| African American | 0.84% |
| Hispanic | 6.82% |
| Asian | 0.65% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 78.8% |
| African American | 1.63% |
| Hispanic | 16.06% |
| Asian | 0.96% |
| Native American | 0.22% |
| Hawaiin/Pacific Islander | 0.09% |