Koro leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 79% of adults in Koro typically vote, above the U.S. average of about 62%. Among adults in Koro, ~24% vote Democratic, ~55% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Koro compares
Among cities within 25 miles, Koro leans more Republican than 39 of 57 neighbors.
Koro runs about 40 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Koro. The southwest side is the most Republican-leaning (R+46) and the northwest side is the least Republican-leaning (R+32), a spread of about 14 points.
Why Koro leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Koro. 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; Koro, 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 Koro looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Koro 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%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Eureka, WI R+41
- Berlin, WI R+28
- Waukau, WI R+40
- Ripon, WI R+21
- Fairburn, WI R+36
- Zion, WI R+29
- Pickett, WI R+35
- Omro, WI R+29
- Green Lake, WI R+19
- Borth, WI R+44
Cities with Similar Populations
- Richardson, IL R+33
- Moore, MT R+61
- Morganton, AR R+67
- Ridenour, TN R+71
- Olive Branch, NC R+66
- Wilsonville, GA R+57
- Briarcliffe Acres, SC R+27
- Edgar, NE R+68
- Elmwood Park, WI D+13
- Theressa, FL R+65
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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.