Sauk City leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 84% of adults in Sauk City typically vote, above the U.S. average of about 62%. Among adults in Sauk City, ~38% vote Democratic, ~46% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Sauk City compares
Among cities within 25 miles, Sauk City leans more Republican than 29 of 54 neighbors.
Sauk City runs about 8 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Sauk City. The southeast side runs the most Democratic (D+8) and the northwest side runs the most Republican (R+25), a spread of about 34 points.
Why Sauk City leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Sauk City, not a ranked or complete list of what matters most.
Sauk City votes Republican even though it is densely developed (about 38%, modestly above the Wisconsin average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Sauk City, WI sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Sauk City looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sauk City 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Sauk City have completed high school, above 85% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Prairie Du Sac, WI R+16
- Roxbury, WI Even
- Lake Wisconsin, WI R+5
- Witwen, WI R+35
- Mazomanie, WI D+5
- Merrimac, WI R+18
- Black Earth, WI D+9
- Martinsville, WI D+14
- North Freedom, WI R+28
- Springfield Corners, WI D+4
Cities with Similar Populations
- Bolivar, OH R+48
- Pioneer, CA R+28
- Littleton, NC R+10
- Swoyersville, PA R+18
- Carnesville, GA R+74
- Winthrop, ME R+4
- Thomasville, AL R+8
- Bronson, MI R+45
- Oak Hill, TN R+10
- Winamac, IN R+50
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.