40215 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 46% of adults in 40215 typically vote, below the U.S. average of about 62%. Among adults in 40215, ~31% vote Democratic, ~15% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 40215 compares
Among zip codes within 15 miles, 40215 leans more Democratic than 32 of 43 neighbors.
40215 runs about 66 points more Democratic than Kentucky as a whole. Kentucky leans Republican overall, while 40215 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 40215. The west side is the most Democratic-leaning (D+57) and the east side is the least Democratic-leaning (D+22), a spread of about 34 points.
Why 40215 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 40215, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 40215 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 50% of adults in 40215 have never been married, above 95% of zip codes. 40215 runs against the grain of Kentucky, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 40215, KY sits in the bottom tenth 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 40215 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 40215 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 43%, about 11 points below the Kentucky average of 54%. Renters vote less often than owners, and about 57% of households in 40215 rent, about 32 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 78% of adults in 40215 have completed high school, below 93% 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.