South Union is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 77% of adults in South Union typically vote, above the U.S. average of about 62%. Among adults in South Union, ~16% vote Democratic, ~61% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How South Union compares
Among cities within 25 miles, South Union leans more Republican than 22 of 80 neighbors.
South Union runs about 28 points more Republican than Kentucky as a whole.
Why South 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 South Union, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 86% of households in South Union are family households, about 19 points above the U.S. average of 67%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; South Union, KY sits in the top tenth nationally on this measure.
Why turnout in South Union looks the way it does
Homeowners vote more often than renters. About 95% of households in South Union own their home, about 17 points above the Kentucky average of 78%. High high-school completion lines up with higher turnout, and about 96% of adults in South Union have completed high school, above 82% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Auburn, KY R+48
- Petros, KY R+51
- Richelieu, KY R+63
- Middleton, KY R+61
- Woodburn, KY R+50
- Rich Pond, KY R+47
- Rockfield, KY R+51
- Gasper, KY R+62
- Salmon, KY R+57
- Browning, KY R+57
Cities with Similar Populations
- Gardens Corner, SC D+38
- Littcarr, KY R+62
- St. Libory, IL R+57
- Reading, KS R+52
- Graysville, GA R+47
- Duke Center, PA R+59
- McGuffey, OH R+64
- Mount Carmel, MS D+25
- Vossburg, MS D+49
- Elrod, NC R+13
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.