66858 is a Republican stronghold. About 15% of voters here vote Democratic and 85% Republican.
About 63% of adults in 66858 typically vote, near the U.S. average of about 62%. Among adults in 66858, ~10% vote Democratic, ~53% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 66858 compares
Among zip codes within 15 miles, 66858 is the most Republican-leaning.
66858 runs about 53 points more Republican than Kansas as a whole.
Why 66858 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 66858. The lean here lands roughly where demographic data alone would predict.
Population density and Republican lean
Places with low population density tend to lean Republican; 66858, KS sits in the bottom tenth nationally on this measure.
Why turnout in 66858 looks the way it does
Homeowners vote more often than renters. About 91% of households in 66858 own their home, about 12 points above the Kansas average of 79%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.