Eureka leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 75% of adults in Eureka typically vote, above the U.S. average of about 62%. Among adults in Eureka, ~22% vote Democratic, ~53% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Eureka compares
Among cities within 25 miles, Eureka leans more Republican than 40 of 55 neighbors.
Eureka runs about 40 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Eureka. The south side is the most Republican-leaning (R+43) and the southeast side is the least Republican-leaning (R+19), a spread of about 24 points.
Why Eureka leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Eureka. The lean here lands roughly where demographic data alone would predict.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Eureka, WI sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Eureka looks the way it does
Homeowners vote more often than renters. About 92% of households in Eureka own their home, about 12 points above the Wisconsin average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Koro, WI R+41
- Waukau, WI R+40
- Berlin, WI R+28
- Zion, WI R+29
- Borth, WI R+44
- Omro, WI R+29
- Rivermoor, WI R+25
- Reighmoor, WI R+29
- Fairburn, WI R+36
- Pickett, WI R+35
Cities with Similar Populations
- Dwight, KS R+60
- East St. Johnsbury, VT R+10
- Ranshaw, PA R+56
- Plum Tree, VA R+37
- West Finley, PA R+59
- New Effington, SD R+47
- Chestnut, IL R+55
- Bruin, PA R+62
- Hawleys, NY R+37
- New Garden, OH R+57
All Local Stats
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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.