St. Croix County leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 90% of adults in St. Croix County typically vote, above the U.S. average of about 62%. Among adults in St. Croix County, ~36% vote Democratic, ~54% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How St. Croix County compares
Among counties within 50 miles, St. Croix County leans more Republican than 8 of 14 neighbors.
St. Croix County runs about 20 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within St. Croix County. The northeast side is the most Republican-leaning (R+42) and the southwest side is the least Republican-leaning (R+8), a spread of about 34 points.
Why St. Croix County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for St. Croix County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 71% of households in St. Croix County are family households, above 84% of counties.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; St. Croix County, WI sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in St. Croix County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. St. Croix County is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in St. Croix County have completed high school, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Washington County, MN D+10
- Pierce County, WI R+19
- Ramsey County, MN D+43
- Polk County, WI R+33
- Dakota County, MN D+11
- Chisago County, MN R+29
- Dunn County, WI R+15
- Anoka County, MN Even
- Hennepin County, MN D+43
- Goodhue County, MN R+22
Counties with Similar Populations
- Lauderdale County, AL R+47
- Rockdale County, GA D+42
- Steuben County, NY R+32
- Pottawattamie County, IA R+18
- Tuscarawas County, OH R+48
- Campbell County, KY R+16
- Bowie County, TX R+29
- Calvert County, MD R+14
- Suffolk City, VA D+20
- Cabell County, WV R+19
Sources and methodology
Precinct-level voting records used to fit the model come from Wisconsin Elections Commission, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.