De Witt County leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 82% of adults in De Witt County typically vote, above the U.S. average of about 62%. Among adults in De Witt County, ~23% vote Democratic, ~59% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How De Witt County compares
Among counties within 50 miles, De Witt County leans more Republican than 10 of 13 neighbors.
De Witt County runs about 54 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while De Witt County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within De Witt County. The southeast side is the most Republican-leaning (R+57) and the south side is the least Republican-leaning (R+38), a spread of about 20 points.
Why De Witt 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 De Witt County, not a ranked or complete list of what matters most.
De Witt County votes against the grain of Illinois. Illinois leans Democratic overall, while De Witt County runs about 54 points more Republican.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; De Witt County, IL sits in the top quarter nationally on this measure.
Why turnout in De Witt County looks the way it does
Turnout in De Witt 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
- Piatt County, IL R+35
- Macon County, IL R+8
- McLean County, IL D+5
- Logan County, IL R+41
- Champaign County, IL D+29
- Moultrie County, IL R+54
- Douglas County, IL R+48
- Ford County, IL R+40
- Tazewell County, IL R+29
- Woodford County, IL R+40
Counties with Similar Populations
- Pawnee County, OK R+59
- Floyd County, VA R+47
- Brown County, IN R+43
- Moniteau County, MO R+60
- Barbour County, WV R+60
- Clark County, IL R+53
- Marquette County, WI R+36
- Vermillion County, IN R+50
- Gooding County, ID R+54
- Redwood County, MN R+47
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.