42378 is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 72% of adults in 42378 typically vote, above the U.S. average of about 62%. Among adults in 42378, ~14% vote Democratic, ~58% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 42378 compares
Among zip codes within 15 miles, 42378 leans more Republican than 5 of 10 neighbors.
42378 runs about 29 points more Republican than Kentucky as a whole.
Politics vary noticeably by block within 42378. The southeast side is the most Republican-leaning (R+68) and the north side is the least Republican-leaning (R+55), a spread of about 13 points.
Why 42378 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 42378, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 42378, about 98% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 18% of adults hold a bachelor's degree, about 11 points below the U.S. average of 28%. Car-dependent areas vote Republican, and about 84% of residents in 42378 drive to work alone, above 83% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 42378, KY sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 42378 looks the way it does
Homeowners vote more often than renters. About 89% of households in 42378 own their home, about 11 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.