Union leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 89% of adults in Union typically vote, above the U.S. average of about 62%. Among adults in Union, ~32% vote Democratic, ~57% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Union compares
Among cities within 25 miles, Union leans more Republican than 51 of 133 neighbors.
Politically, Union sits close to the rest of Kentucky.
Politics vary noticeably by neighborhood within Union. The southwest side is the most Republican-leaning (R+49) and the northeast side is the least Republican-leaning (R+11), a spread of about 37 points.
Why Union leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Union, not a ranked or complete list of what matters most.
Union votes Republican even though it is densely developed (about 70%, far above the Kentucky average of 18%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 80% of households in Union are family households, above 88% of cities.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Union, KY sits in the top quarter nationally on this measure.
Why turnout in Union looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Union is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 90% of households in Union own their home, about 15 points above the U.S. average of 75%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Florence, KY R+19
- Walton, KY R+41
- Beaverlick, KY R+51
- Constance, KY R+33
- Elsmere, KY R+16
- Burlington, KY R+30
- Erlanger, KY R+14
- Independence, KY R+31
- Edgewood, KY R+16
- Hamilton, KY R+57
Cities with Similar Populations
- Moss Point, MS R+12
- Harleysville, PA Even
- Randolph, NJ D+7
- Madisonville, KY R+38
- Kelso, WA R+18
- Benbrook, TX R+23
- Avon Lake, OH R+3
- Morrow, GA D+55
- Franklin Square, NY R+30
- Maywood, CA D+38
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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.