40109 is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 68% of adults in 40109 typically vote, above the U.S. average of about 62%. Among adults in 40109, ~16% vote Democratic, ~52% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 40109 compares
Among zip codes within 15 miles, 40109 leans more Republican than 30 of 33 neighbors.
40109 runs about 21 points more Republican than Kentucky as a whole.
Politics vary noticeably by block within 40109. The southwest side is the most Republican-leaning (R+60) and the east side is the least Republican-leaning (R+45), a spread of about 15 points.
Why 40109 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 40109, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 7% of adults in 40109 hold a bachelor's degree, about 12 points below the Kentucky average of 19%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 40109, KY sits below 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 40109 looks the way it does
Homeowners vote more often than renters. About 93% of households in 40109 own their home, about 16 points above the Kentucky average of 78%. 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.