Dillon leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 81% of adults in Dillon typically vote, above the U.S. average of about 62%. Among adults in Dillon, ~20% vote Democratic, ~61% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Dillon compares
Among cities within 25 miles, Dillon leans more Republican than 54 of 70 neighbors.
Dillon runs about 60 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Dillon is one of the few Republican-leaning pockets.
Why Dillon 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 Dillon, not a ranked or complete list of what matters most.
Dillon votes against the grain of Illinois. Illinois leans Democratic overall, while Dillon runs about 60 points more Republican. A high family-household share predicts Republican voting, and about 75% of households in Dillon are family households, above 76% of cities.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Dillon, IL sits in the top tenth nationally on this measure.
Why turnout in Dillon looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dillon 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 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Dillon have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Tremont, IL R+47
- Pekin Heights, IL R+49
- Towne Oaks, IL R+38
- Groveland, IL R+34
- Hopedale, IL R+51
- South Pekin, IL R+46
- Pekin, IL R+25
- Morton, IL R+25
- Delavan, IL R+43
- Green Valley, IL R+46
Cities with Similar Populations
- New Century, KS R+9
- Washington, VA R+12
- Ravenden, AR R+66
- Fairdealing, KY R+61
- North Perry, OH R+36
- Temple, MI R+48
- Bendersville, PA R+38
- Overbrook, OK R+68
- Downs Chapel, DE R+41
- Valleyview, OH R+5
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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.