How many people live in St. Croix County, WI?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 98,000 people living in St. Croix County, WI. That makes St. Croix County the 17th-most populous county in Wisconsin. It is home to 1.6% of people living in the state.
98K
population of St. Croix County, WI (2024)
1.6%
County share of the Wisconsin population (2024)
About 98,000 people lived in St. Croix County, WI in 2024.
Population estimates, 2000–2024
What are St. Croix County, WI’s age demographics?
About 17,000 St. Croix County residents are aged 65 and older in 2024. That represents 17.4% of its population. For comparison, the age group represents 19.6% of Wisconsin’s population and 18% in the US overall.
Another 22,500 St. Croix County residents, or 22.9% of the population, were children under 18. For comparison, the age group represents 20.8% of Wisconsin’s population and 21.6% in the US overall.
A higher share of St. Croix County, WI's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are St. Croix County, WI’s racial and ethnic demographics?
Non-Hispanic white residents make up 92.4% of the St. Croix County, WI population, higher than the national share of 57.5%.
In contrast, St. Croix County’s Hispanic population accounts for 3.3%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.8% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. Croix County, WI has a higher share of a non-Hispanic white population than Wisconsin as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in St. Croix County, WI is Hudson with about 15,000 residents in 2024.
Cities and towns in St. Croix County, WI ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Hudson | 15,031 |
| 2. | New Richmond | 10,879 |
| 3. | Hudson | 8,746 |
| 4. | Troy | 5,606 |
| 5. | River Falls (pt.) | 4,995 |
| 6. | Somerset | 4,488 |
| 7. | St. Joseph | 4,360 |
| 8. | Baldwin | 4,352 |
| 9. | Richmond | 4,249 |
| 10. | North Hudson | 3,819 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
