Waukesha County's 2026 population is estimated at 423,061, reflecting a 0.72% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Waukesha County is the 3rd largest county in Wisconsin. The 2010 population was 390,051 and has grown 8.46% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.5 years
Female: 44.6 years
Male: 42.5 years
There are 325,464 adults, (84,338 of whom are seniors) in Waukesha County.
Female: 207,556 (50.4%)
Male: 204,206 (49.6%)
The racial composition of Waukesha County includes 86.74% White, 3.88% Asian, and smaller percentages for Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 357,179 | 86.74% |
| Two or more races | 25,425 | 6.17% |
| Asian | 15,988 | 3.88% |
| Black or African American | 6,501 | 1.58% |
| Other race | 5,609 | 1.36% |
| Native American | 1,028 | 0.25% |
| Native Hawaiian or Pacific Islander | 32 | 0.01% |
Waukesha County 's average per capita income is $67,176. Household income levels show a median of $106,076. The poverty rate stands at 5.23%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $143,015 | $178,223 |
| Families | $132,381 | $165,195 |
| Households | $106,076 | $137,605 |
| Non Families | $56,718 | $76,896 |
Average Income
Median Household Income
Poverty Rate
