Washington County's estimated 2026 population is 139,732 with a growth rate of 0.35% 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 5.87% since that time.
Data after 2023 is projected based on recent change
Overall: 43.8 years
Female: 44.6 years
Male: 43.2 years
There are 108,954 adults, (27,367 of whom are seniors) in Washington County.
Female: 69,013 (50.1%)
Male: 68,866 (49.9%)
The racial composition of Washington County includes 91.41% White, and smaller percentages for Asian, Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 126,038 | 91.41% |
| Two or more races | 6,475 | 4.7% |
| Asian | 2,019 | 1.46% |
| Black or African American | 1,836 | 1.33% |
| Other race | 1,301 | 0.94% |
| Native American | 188 | 0.14% |
| Native Hawaiian or Pacific Islander | 22 | 0.02% |
Washington County's average per capita income is $61,392. Household income levels show a median of $96,359. The poverty rate stands at 5.79%.
Name | Median | Mean |
|---|---|---|
| Married Families | $126,682 | $146,485 |
| Families | $114,977 | $137,147 |
| Households | $96,359 | $116,246 |
| Non Families | $52,809 | $66,133 |
Average Income
Median Household Income
Poverty Rate
