Jefferson County's estimated 2026 population is 86,470 with a growth rate of -0.04% 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 3.28% since that time.
Data after 2023 is projected based on recent change
Overall: 41.5 years
Female: 42.1 years
Male: 41.1 years
There are 69,032 adults, (15,933 of whom are seniors) in Jefferson County.
Female: 43,005 (50%)
Male: 42,998 (50%)
The racial composition of Jefferson County includes 88.56% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 76,167 | 88.56% |
| Two or more races | 5,610 | 6.52% |
| Other race | 2,424 | 2.82% |
| Black or African American | 809 | 0.94% |
| Asian | 561 | 0.65% |
| Native American | 362 | 0.42% |
| Native Hawaiian or Pacific Islander | 70 | 0.08% |
Jefferson County's average per capita income is $52,022. Household income levels show a median of $83,750. The poverty rate stands at 8.11%.
Name | Median | Mean |
|---|---|---|
| Married Families | $113,367 | $129,208 |
| Families | $102,632 | $117,282 |
| Households | $83,750 | $100,082 |
| Non Families | $50,545 | $65,698 |
Average Income
Median Household Income
Poverty Rate
