Jennings County is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 70% of adults in Jennings County typically vote, above the U.S. average of about 62%. Among adults in Jennings County, ~15% vote Democratic, ~55% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Jennings County compares
Among counties within 50 miles, Jennings County leans more Republican than 16 of 24 neighbors.
Jennings County runs about 37 points more Republican than Indiana as a whole.
Why Jennings 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 Jennings 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 Jennings County, about 93% of residents are non-Hispanic white, about 21 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 8 points below the Indiana average of 22%. Car-dependent areas vote Republican, and about 82% of residents in Jennings County drive to work alone, above 83% of counties. A high family-household share predicts Republican voting, and about 69% of households in Jennings County are family households, above 77% of counties.
Renting and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Jennings County, IN sits below the national average on this measure.
Why turnout in Jennings County looks the way it does
Turnout in Jennings 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
- Jackson County, IN R+51
- Bartholomew County, IN R+30
- Jefferson County, IN R+43
- Scott County, IN R+53
- Decatur County, IN R+54
- Ripley County, IN R+59
- Trimble County, KY R+57
- Brown County, IN R+43
- Carroll County, KY R+51
- Switzerland County, IN R+63
Counties with Similar Populations
- Henry County, OH R+53
- Upson County, GA R+30
- Del Norte County, CA R+15
- Adams County, OH R+64
- Union County, MS R+63
- Jackson County, WV R+57
- Logan County, KY R+56
- San Jacinto County, TX R+57
- Orleans County, VT R+17
- Tillamook County, OR R+9
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.