Iowa County leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 72% of adults in Iowa County typically vote, above the U.S. average of about 62%. Among adults in Iowa County, ~32% vote Democratic, ~40% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Iowa County compares
Among counties within 50 miles, Iowa County leans more Republican than 1 of 9 neighbors.
Iowa County runs about 10 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within Iowa County. The north side runs the most Democratic (D+6) and the southwest side runs the most Republican (R+27), a spread of about 33 points.
Why Iowa 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 Iowa County, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Iowa County sits in the bottom quarter on density and about 92% of residents are non-Hispanic white, about 6 points above the Wisconsin average of 87%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Iowa County, WI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Iowa County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Iowa 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 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 95% of adults in Iowa County have completed high school, above 92% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Lafayette County, WI R+31
- Grant County, WI R+23
- Richland County, WI R+19
- Sauk County, WI R+20
- Green County, WI R+11
- Dane County, WI D+48
- Jo Daviess County, IL R+18
- Crawford County, WI R+26
- Dubuque County, IA R+12
- Columbia County, WI R+17
Counties with Similar Populations
- Page County, VA R+53
- Saline County, IL R+50
- Ohio County, KY R+63
- Upshur County, WV R+55
- Aransas County, TX R+46
- Mingo County, WV R+71
- Anderson County, KY R+50
- Seminole County, OK R+51
- Itawamba County, MS R+76
- Winston County, AL R+82
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.