Jefferson County's estimated 2026 population is 86,793 with a growth rate of 0.32% in the past year according to the most recent United States census data. Jefferson County is the 20th largest county in Wisconsin. The 2010 population was 83,727 and has seen a growth of 3.66% since that time.
Data after 2023 is projected based on recent change
The racial composition of Jefferson County includes 89.75% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (89.75%)
Two or more races (5.16%)
Other race (2.93%)
Black or African American (1.13%)
Asian (0.61%)
Native American (0.31%)
Native Hawaiian or Pacific Islander (0.11%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 77,066 | 89.75% |
| Two or more races | 4,430 | 5.16% |
| Other race | 2,518 | 2.93% |
| Black or African American | 970 | 1.13% |
| Asian | 524 | 0.61% |
| Native American | 264 | 0.31% |
| Native Hawaiian or Pacific Islander | 95 | 0.11% |
Married
Widowed
Divorced
Separated
Never Married
Jefferson County's average per capita income is $51,378. Household income levels show a median of $80,604. The poverty rate stands at 8.13%.
Name | Median | Mean |
|---|---|---|
| Married Families | $112,808 | $126,380 |
| Families | $100,612 | $114,397 |
| Households | $80,604 | $97,779 |
| Non Families | $48,222 | $62,847 |
Average Income
Median Household Income
Poverty Rate
