Eureka is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 76% of adults in Eureka typically vote, above the U.S. average of about 62%. Among adults in Eureka, ~17% vote Democratic, ~59% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How Eureka compares
Among cities within 25 miles, Eureka is the least Republican-leaning.
Eureka runs about 38 points more Republican than Kansas as a whole.
Politics vary noticeably by neighborhood within Eureka. The southwest side is the most Republican-leaning (R+65) and the east side is the least Republican-leaning (R+53), a spread of about 13 points.
Why Eureka 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 Eureka, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 13% of adults in Eureka hold a bachelor's degree, about 13 points below the Kansas average of 27%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Eureka, KS sits in the top quarter nationally 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
Turnout in Eureka sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Lamont, KS R+63
- Tonovay, KS R+67
- Reece, KS R+70
- Neal, KS R+66
- Severy, KS R+69
- Hamilton, KS R+71
- Piedmont, KS R+69
- Virgil, KS R+69
Cities with Similar Populations
- Green Lake, WI R+19
- Clarksville, MI R+40
- Frenchtown, MT R+35
- Steele, MO R+55
- Draper, VA R+60
- Cimarron, KS R+71
- Belmont, MS R+78
- Maidens, VA R+26
- Red Rock, AZ R+43
- Horseshoe Bend, AR R+53
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Sources and methodology
Precinct-level voting records used to fit the model come from Kansas Secretary of State, Elections, 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.