Union County is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 72% of adults in Union County typically vote, above the U.S. average of about 62%. Among adults in Union County, ~15% vote Democratic, ~57% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Union County compares
Among counties within 50 miles, Union County leans more Republican than 19 of 23 neighbors.
Union County runs about 39 points more Republican than Indiana as a whole.
Why Union County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Union County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Union County, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 18% of adults hold a bachelor's degree, about 10 points below the U.S. average of 28%. Car-dependent areas vote Republican, and about 84% of residents in Union County drive to work alone, above 90% of counties. A high family-household share predicts Republican voting, and about 71% of households in Union County are family households, above 84% of counties.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Union County, IN sits below the national average 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 Union County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Union County 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 62%, above 59% of counties. Homeowners vote more often than renters, and about 81% of households in Union County own their home, above 81% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Fayette County, IN R+54
- Wayne County, IN R+31
- Franklin County, IN R+63
- Preble County, OH R+58
- Butler County, OH R+20
- Rush County, IN R+57
- Dearborn County, IN R+53
- Henry County, IN R+47
- Ripley County, IN R+59
- Decatur County, IN R+54
Counties with Similar Populations
- Kit Carson County, CO R+64
- Pocahontas County, IA R+48
- Brooks County, TX D+7
- Nemaha County, NE R+45
- Beaver County, UT R+69
- Dallam County, TX R+46
- Blaine County, MT Even
- Shannon County, MO R+68
- Caribou County, ID R+73
- Goliad County, TX R+60
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Sources and methodology
Precinct-level voting records used to fit the model come from Indiana Secretary of State, 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.