Solon Mills leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 83% of adults in Solon Mills typically vote, above the U.S. average of about 62%. Among adults in Solon Mills, ~33% vote Democratic, ~50% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Solon Mills compares
Among cities within 25 miles, Solon Mills leans more Republican than 91 of 136 neighbors.
Solon Mills runs about 31 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Solon Mills is one of the few Republican-leaning pockets.
Why Solon Mills 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 Solon Mills, not a ranked or complete list of what matters most.
Solon Mills votes Republican even though it is densely developed (about 26%, modestly below the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Solon Mills runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Income per capita and voter turnout
Places with high per-capita income tend to turn out at a higher rate; Solon Mills, IL sits in the top tenth nationally on this measure.
Why turnout in Solon Mills looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Solon Mills 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Richmond, IL R+14
- Spring Grove, IL R+23
- Ringwood, IL R+25
- Pistakee Highlands, IL R+14
- Johnsburg, IL R+19
- Twin Lakes, WI R+27
- Fox Lake, IL R+11
- Genoa City, WI R+30
- McCullom Lake, IL R+12
Cities with Similar Populations
- Walker, AR R+72
- Middleton Corner, OH R+62
- Mathews, LA R+55
- Cooperstown, IL R+60
- Drybranch, WV R+57
- Perks, IL R+59
- Belzoni, OK R+79
- Bendena, KS R+64
- Watts Bar Estates, TN R+64
- Rockport, IL R+72
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.