Henderson County leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 66% of adults in Henderson County typically vote, near the U.S. average of about 62%. Among adults in Henderson County, ~22% vote Democratic, ~44% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Henderson County compares
Among counties within 50 miles, Henderson County leans more Republican than 2 of 21 neighbors.
Politically, Henderson County sits close to the rest of Kentucky.
Politics vary noticeably by city within Henderson County. The northwest side runs the most Democratic (Even) and the southeast side runs the most Republican (R+56), a spread of about 57 points.
Why Henderson County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Henderson County. The lean here lands roughly where demographic data alone would predict.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Henderson County, KY sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Henderson County looks the way it does
Turnout in Henderson County 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 Counties
- Vanderburgh County, IN R+9
- Warrick County, IN R+33
- Posey County, IN R+45
- Webster County, KY R+58
- Union County, KY R+56
- Daviess County, KY R+31
- McLean County, KY R+58
- Spencer County, IN R+49
- Gibson County, IN R+49
- Hopkins County, KY R+48
Counties with Similar Populations
- Wood County, TX R+68
- Bryan County, GA R+35
- Branch County, MI R+38
- Warren County, MS D+6
- Washington County, MS D+48
- Beaufort County, NC R+24
- Phelps County, MO R+33
- Stephenson County, IL R+14
- Macoupin County, IL R+42
- Polk County, WI R+33
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.