Washington County's estimated 2026 population is 139,189 with a growth rate of 0.17% in the past year according to the most recent United States census data. Washington County is the 11th largest county in Wisconsin. The 2010 population was 131,990 and has seen a growth of 5.45% since that time.
Data after 2023 is projected based on recent change
The racial composition of Washington County includes 92.14% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (92.14%)
Two or more races (3.76%)
Black or African American (1.56%)
Asian (1.54%)
Other race (0.83%)
Native American (0.16%)
Native Hawaiian or Pacific Islander (0.01%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 126,532 | 92.14% |
| Two or more races | 5,161 | 3.76% |
| Black or African American | 2,137 | 1.56% |
| Asian | 2,109 | 1.54% |
| Other race | 1,139 | 0.83% |
| Native American | 226 | 0.16% |
| Native Hawaiian or Pacific Islander | 16 | 0.01% |
Married
Widowed
Divorced
Separated
Never Married
Washington County's average per capita income is $59,453. Household income levels show a median of $95,851. The poverty rate stands at 5.26%.
Name | Median | Mean |
|---|---|---|
| Married Families | $124,402 | $144,311 |
| Families | $112,723 | $134,969 |
| Households | $95,851 | $115,147 |
| Non Families | $52,795 | $65,840 |
Average Income
Median Household Income
Poverty Rate
