St. Croix County, Wisconsin Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 17th-largest in Wisconsin
The population of St. Croix County, Wisconsin is 94,819 as of the 2023 American Community Survey, making it the 17th-largest county in Wisconsin. The median household income is $102,482, the median home value is $349,700, and the median age is 39.8.
The population of St. Croix County has grown 16.1% since 2010 (84,399 → 97,954), a +1.07% annualized rate.
94,819
Population
+1.07%
Annual growth
131
People / sq mi
$102,482
Median Income
$349,700
Median Home Value
St. Croix County covers 722 sq mi of land at 131.3 people per square mile.
About St. Croix County, WI
What sets St. Croix County apart is money: median household income runs $102,482, above the US median of $78,538. With 94,819 residents, St. Croix County is a county in Wisconsin. It ranks #17 among counties in Wisconsin by population.
Households here are among the highest-earning of all US counties: median income is $102,482, above the US median of $78,538. Poverty is relatively low for US counties at 4.8%, below the national 12.4%. Home values run above average at $349,700, with typical rent around $1,238.
St. Croix County is among the best-educated US counties: 39.4% of adults 25 and older hold a bachelor’s degree, above the national 35.0%. A solid 14.3% of workers are based at home, close to the national 14.0%, and the average commute runs about 27 minutes each way.
Taken together, the income and housing figures place St. Croix County firmly in the higher-cost, higher-earning tier of US counties — a profile that tends to track dense job markets and competitive housing.
St. Croix County Population History (2010-2024)
The county of St. Croix County had a population of 84,399 in 2010 and 97,954 in 2024, a 16.1% growth over 14 years. The peak was 97,954 in 2024. Average annual growth rate: 1.07%.
97,954
Population (2024)
84,399
Population (2010)
97,954
Peak (2024)
1.07%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 84,399 |
| 2011 | 84,836 |
| 2012 | 85,075 |
| 2013 | 85,700 |
| 2014 | 86,599 |
| 2015 | 87,207 |
| 2016 | 87,643 |
| 2017 | 88,615 |
| 2018 | 89,721 |
| 2019 | 90,691 |
| 2020 | 93,893 |
| 2021 | 95,025 |
| 2022 | 96,138 |
| 2023 | 97,156 |
| 2024 | 97,954 |
Race & Ethnicity
| White | 93.0% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
39.8
Median Age
49.7%
Female
50.3%
Male
15.4%
Age 65+
Age Distribution
Children (under 15): 19.6% · Seniors (65+): 15.4%
Income & Poverty
| Median household income | $102,482+$26,812 vs state |
| Mean household income | $124,042 |
| Per-capita income | $48,851 |
| Poverty rate | 4.8%-1.8% vs state |
| Unemployment rate | 1.4% |
| Employment-to-population | 68.5% |
Top Industries by Employment
The largest employment sector in St. Croix County is professional & business services, accounting for 22.1% of workers.
How residents commute
0.2%
Drive alone
1.4%
Carpool
75.9%
Public transit
14.3%
Work from home
26.6 min
Avg commute
Housing
$349,700+$102,300 vs state
Median home value
$1,238
Median rent
78.9%
Homeownership rate
38,185
Total housing units
96.2%
Occupied
3.8%
Vacant
21.1%
Renter-occupied
Social & access
96.3%
With health insurance
96.4%
With broadband internet
53.3%
Foreign-born
7.1%
Veterans (18+)
9.9%
With a disability
96.5%
Speak language other than English at home
Education
96.3%
High School+
39.4%
Bachelor's+
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Frequently Asked Questions
St. Croix County, Wisconsin has a population of 94,819 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 17th-largest county in Wisconsin. Population density is 131 people per square mile.
The population of St. Croix County has grown 16.1% since 2010 (84,399 → 97,954), a +1.07% annualized rate.
The median household income in St. Croix County, Wisconsin is $102,482, with mean (average) household income of $124,042 and per-capita income of $48,851. 4.8% of residents live below the federal poverty level.
In St. Croix County, the largest racial and ethnic groups are White (93.0%), Hispanic or Latino (0.9%), Black or African American (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in St. Croix County, Wisconsin is 39.8 years. Residents are 49.7% female and 50.3% male.
The median home value in St. Croix County is $349,700 and median monthly rent is $1,238. 78.9% of occupied housing units are owner-occupied. The county has 38,185 total housing units, 3.8% of which are vacant.
The largest employment sector in St. Croix County, Wisconsin is professional, scientific, and management services, employing 22.1% of workers. The unemployment rate is 1.4%.
Milwaukee is among the largest cities associated with St. Croix County, Wisconsin, with a population of 569,756.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.