66204 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 71% of adults in 66204 typically vote, above the U.S. average of about 62%. Among adults in 66204, ~45% vote Democratic, ~26% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 66204 compares
Among zip codes within 15 miles, 66204 leans more Democratic than 44 of 78 neighbors.
66204 runs about 44 points more Democratic than Kansas as a whole. Kansas leans Republican overall, while 66204 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 66204. The southeast side is the most Democratic-leaning (D+38) and the north side is the least Democratic-leaning (D+22), a spread of about 16 points.
Why 66204 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 66204, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 66204 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 66204 sits in the top quarter (about 47%, above 87% of zip codes). 66204 runs against the grain of Kansas, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 66204, KS sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 66204 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 66204 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 71%, about 11 points above the U.S. average of 60%. 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.