St. Croix County, Wisconsin
Located in Wisconsin, St. Croix County has a population of 96,033 residents and a median age of 40.4 years, making it the #643 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 6.6%. The median home value is $377,700, and the median household income is $103,046, which is 37% above the national median.
Demographics
St. Croix County has a population of 96,033, making it the #643 most populous county in the US. The median age is 40.4 years, which is 3.9% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in St. Croix County is $103,046, ranking #144 out of 3,222 counties — 37.1% above the national median. The poverty rate is 6.6% and unemployment stands at 2.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in St. Croix County is $377,700 (+34.0% vs national). Renters pay a median of $1,271/mo and the homeownership rate is 78.3%.
Median Home Value Trend
Rankings →Household Type
Education
In St. Croix County, 39.5% of adults age 25+ hold a bachelor's degree or higher, which is 17.1% above the national average, ranking #294 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in St. Croix County is 79.8 years. 11.5% of adults report poor or fair health and 4.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
11.3% of adults in St. Croix County smoke , 33.6% are obese , and 27.7% report excessive drinking. The drug overdose death rate is 11.3 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 12.2 per 100,000. Motor vehicle deaths occur at a rate of 8.9 per 100,000.
Suicide Rate Trend
Families & Children
5.4% of children in St. Croix County live in poverty and the infant mortality rate is 4.9 per 1,000 live births. The teen birth rate is 4.9 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in St. Croix County is 85.1%. The mean commute time is 29.6 min, which is 7.3% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, St. Croix County voted Republican with a margin of 19.3%. The vote was 39.5% Dem / 58.8% Rep. Compared to 2020, the margin shifted 3.4 toward Republicans .
Vote Share Over Time
About St. Croix County, Wisconsin
St. Croix County, Wisconsin has a total population of 96,033, making it the 643rd most populous county in the United States. The median age in St. Croix County is 40.4 years, which is 3.9% above the national median of 38.9 years.
The median household income in St. Croix County is $103,046, which ranks #144 of 3,222 counties nationwide. This is 37.1% above the national median of $75,149. The poverty rate is 6.6%, lower than the national rate of 12.6%. The unemployment rate stands at 2.6%.
The median home value in St. Croix County is $377,700, 34.0% above the national median. Renters in St. Croix County pay a median gross rent of $1,271 per month. The homeownership rate is 78.3%, compared to the national rate of 64.4%.
In St. Croix County, 39.5% of residents aged 25 and older hold a bachelor's degree or higher, 17.1% above the national average of 33.7%. Health insurance coverage stands at 95.9% of the population. The average commute time for workers is 29.6 min.
St. Croix County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.4% of the population, followed by Two or More Races (3.3%) and Hispanic or Latino (3.1%).
All data for St. Croix County, Wisconsin comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.