Onaga leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 74% of adults in Onaga typically vote, above the U.S. average of about 62%. Among adults in Onaga, ~19% vote Democratic, ~55% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Onaga compares
Among cities within 25 miles, Onaga leans more Republican than 5 of 28 neighbors.
Onaga runs about 32 points more Republican than Kansas as a whole.
Politics vary noticeably by neighborhood within Onaga. The southwest side is the most Republican-leaning (R+56) and the east side is the least Republican-leaning (R+45), a spread of about 11 points.
Why Onaga leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Onaga. The lean here lands roughly where demographic data alone would predict.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Onaga, KS sits in the top quarter nationally on this measure.
Why turnout in Onaga looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in Onaga have completed high school, about 6 points above the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Havensville, KS R+58
- Wheaton, KS R+58
- Neuchatel, KS R+67
- Soldier, KS R+61
- St. Clere, KS R+50
- Emmett, KS R+64
- Westmoreland, KS R+55
- Corning, KS R+72
- Centralia, KS R+67
- Vermillion, KS R+63
Cities with Similar Populations
- Moulton, IA R+53
- Stephensville, WI R+47
- Kirkville, MS R+88
- Willow, FL R+49
- Elizabeth, LA R+90
- Barton, MD R+63
- Lake Kathryn, FL R+57
- Camas Valley, OR R+51
- Bancroft, NE R+69
- Minnesota Lake, MN R+46
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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.