66109 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 67% of adults in 66109 typically vote, near the U.S. average of about 62%. Among adults in 66109, ~36% vote Democratic, ~32% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 66109 compares
Among zip codes within 15 miles, 66109 leans more Democratic than 23 of 53 neighbors.
66109 runs about 22 points more Democratic than Kansas as a whole. Kansas leans Republican overall, while 66109 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 66109. The southeast side runs the most Democratic (D+31) and the northwest side runs the most Republican (R+15), a spread of about 46 points.
Why 66109 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 66109, not a ranked or complete list of what matters most.
66109 votes against the grain of Kansas. Kansas leans Republican overall, while 66109 runs about 22 points more Democratic.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 66109, KS sits above 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 66109 looks the way it does
Turnout in 66109 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 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.