St. Croix County's estimated 2026 population is 99,550 with a growth rate of 0.81% in the past year according to the most recent United States census data. St. Croix County is the 17th largest county in Wisconsin. The 2010 population was 84,399 and has seen a growth of 17.95% since that time.
Data after 2023 is projected based on recent change
The racial composition of St. Croix County includes 92.99% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (92.99%)
Two or more races (4.24%)
Other race (1.02%)
Asian (0.97%)
Black or African American (0.7%)
Native American (0.07%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 88,169 | 92.99% |
| Two or more races | 4,018 | 4.24% |
| Other race | 965 | 1.02% |
| Asian | 922 | 0.97% |
| Black or African American | 665 | 0.7% |
| Native American | 64 | 0.07% |
| Native Hawaiian or Pacific Islander | 16 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
St. Croix County's average per capita income is $60,575. Household income levels show a median of $102,482. The poverty rate stands at 6.59%.
Name | Median | Mean |
|---|---|---|
| Married Families | $133,352 | $156,170 |
| Families | $122,381 | $143,061 |
| Households | $102,482 | $124,042 |
| Non Families | $56,838 | $70,989 |
Average Income
Median Household Income
Poverty Rate
