Jasper County is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 83% of adults in Jasper County typically vote, above the U.S. average of about 62%. Among adults in Jasper County, ~16% vote Democratic, ~67% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Jasper County compares
Among counties within 50 miles, Jasper County leans more Republican than 14 of 17 neighbors.
Jasper County runs about 72 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Jasper County is one of the few Republican-leaning pockets.
Why Jasper 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 Jasper County, not a ranked or complete list of what matters most.
Jasper County votes against the grain of Illinois. Illinois leans Democratic overall, while Jasper County runs about 72 points more Republican. A high family-household share predicts Republican voting, and about 70% of households in Jasper County are family households, above 81% of counties.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Jasper County, IL sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Jasper County looks the way it does
Homeowners vote more often than renters. About 85% of households in Jasper County own their home, about 5 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Richland County, IL R+50
- Cumberland County, IL R+60
- Crawford County, IL R+50
- Effingham County, IL R+56
- Clay County, IL R+63
- Lawrence County, IL R+47
- Clark County, IL R+53
- Coles County, IL R+26
- Sullivan County, IN R+49
- Edwards County, IL R+64
Counties with Similar Populations
- St. Clair County, MO R+64
- Todd County, SD D+57
- Nowata County, OK R+61
- Clinton County, KY R+72
- Somervell County, TX R+67
- Beaverhead County, MT R+42
- Charles Mix County, SD R+39
- Johnson County, GA R+39
- Emmet County, IA R+37
- Terrell County, GA D+18
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Illinois 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.