66040 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 74% of adults in 66040 typically vote, above the U.S. average of about 62%. Among adults in 66040, ~16% vote Democratic, ~58% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 66040 compares
Among zip codes within 15 miles, 66040 leans more Republican than 2 of 7 neighbors.
66040 runs about 39 points more Republican than Kansas as a whole.
Politics vary noticeably by block within 66040. The southwest side is the most Republican-leaning (R+64) and the northeast side is the least Republican-leaning (R+50), a spread of about 14 points.
Why 66040 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 66040. The lean here lands roughly where demographic data alone would predict.
Never-married share and voter turnout
Places with a low never-married share tend to turn out at a higher rate; 66040, KS sits in the bottom quarter nationally on this measure.
Why turnout in 66040 looks the way it does
Turnout in 66040 sits close to the national pattern. 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.