40509 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 70% of adults in 40509 typically vote, above the U.S. average of about 62%. Among adults in 40509, ~41% vote Democratic, ~29% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 40509 compares
Among zip codes within 15 miles, 40509 leans more Democratic than 8 of 18 neighbors.
40509 runs about 46 points more Democratic than Kentucky as a whole. Kentucky leans Republican overall, while 40509 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 40509. The west side runs the most Democratic (D+31) and the northeast side runs the most Republican (R+5), a spread of about 36 points.
Why 40509 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 40509, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 55% of adults in 40509 hold a bachelor's degree, about 27 points above the U.S. average of 28%. Dense areas vote Democratic, and 40509 sits in the top fifth on density (about 85%, above 85% of zip codes). 40509 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; 40509, KY sits in the top quarter nationally on this measure.
Why turnout in 40509 looks the way it does
Turnout in 40509 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 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.