Green County leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 83% of adults in Green County typically vote, above the U.S. average of about 62%. Among adults in Green County, ~38% vote Democratic, ~46% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Green County compares
Among counties within 50 miles, Green County leans more Republican than 4 of 11 neighbors.
Green County runs about 10 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within Green County. The southeast side is the most split-leaning (R+32) and the northwest side is the least split-leaning (R+3), a spread of about 30 points.
Why Green County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Green County. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Green County, WI sits in the top quarter 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 Green County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Green 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 67%, about 7 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 94% of adults in Green County have completed high school, above 83% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Stephenson County, IL R+14
- Rock County, WI Even
- Lafayette County, WI R+31
- Dane County, WI D+48
- Iowa County, WI R+11
- Winnebago County, IL D+7
- Jo Daviess County, IL R+18
- Boone County, IL R+15
- Carroll County, IL R+34
- Jefferson County, WI R+21
Counties with Similar Populations
- Williams County, OH R+50
- Calloway County, KY R+36
- Jefferson County, IL R+44
- Albany County, WY D+12
- Dodge County, NE R+31
- Macon County, NC R+42
- Webster County, IA R+22
- Yadkin County, NC R+61
- Clark County, KY R+39
- Webster Parish, LA R+27
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.