40220 leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 66% of adults in 40220 typically vote, near the U.S. average of about 62%. Among adults in 40220, ~40% vote Democratic, ~26% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 40220 compares
Among zip codes within 15 miles, 40220 leans more Democratic than 30 of 46 neighbors.
40220 runs about 51 points more Democratic than Kentucky as a whole. Kentucky leans Republican overall, while 40220 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 40220. The west side is the most Democratic-leaning (D+28) and the north side is the least Democratic-leaning (D+10), a spread of about 19 points.
Why 40220 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 40220, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 40220 live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 40220 sits in the top quarter (about 44%, above 85% of zip codes). 40220 runs against the grain of Kentucky, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 40220, KY sits in the top tenth nationally on this measure.
Why turnout in 40220 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 40220 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 64%, above 61% of zip codes. 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 Kentucky State Board of 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.