40939 is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.
About 65% of adults in 40939 typically vote, near the U.S. average of about 62%. Among adults in 40939, ~9% vote Democratic, ~56% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How 40939 compares
Among zip codes within 15 miles, 40939 leans more Republican than 8 of 23 neighbors.
40939 runs about 43 points more Republican than Kentucky as a whole.
Why 40939 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 40939, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 40939, more than 99% of residents are non-Hispanic white, about 27 points above the U.S. average of 72%; about 13% of adults hold a bachelor's degree, about 6 points below the Kentucky average of 19%. Car-dependent areas vote Republican, and about 89% of residents in 40939 drive to work alone, above 95% of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 40939, 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 40939 looks the way it does
Turnout in 40939 sits close to the national pattern. 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.