Dewey leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 85% of adults in Dewey typically vote, above the U.S. average of about 62%. Among adults in Dewey, ~25% vote Democratic, ~60% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Dewey compares
Among cities within 25 miles, Dewey leans more Republican than 22 of 57 neighbors.
Dewey runs about 53 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Dewey is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Dewey. The southeast side is the most Republican-leaning (R+50) and the southwest side is the least Republican-leaning (R+31), a spread of about 19 points.
Why Dewey 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 Dewey, not a ranked or complete list of what matters most.
Dewey votes against the grain of Illinois. Illinois leans Democratic overall, while Dewey runs about 53 points more Republican. Car-dependent areas vote Republican, and about 85% of residents in Dewey drive to work alone, above 81% of cities. A high family-household share predicts Republican voting, and about 90% of households in Dewey are family households, in the top fraction of cities.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Dewey, IL does.
Why turnout in Dewey looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dewey 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 71%, about 11 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in Dewey own their home, about 20 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Dewey have completed high school, above 98% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fisher, IL R+47
- Tomlinson, IL R+48
- Prospect, IL R+47
- Lotus, IL R+45
- Foosland, IL R+48
- Osman, IL R+42
- Mahomet, IL R+11
- Thomasboro, IL R+38
- Rantoul, IL D+11
- Harpster, IL R+56
Cities with Similar Populations
- Dexter, MN R+47
- Hillsdale, LA Even
- Richards, TX R+68
- Virgin, UT R+61
- Hillsboro Pines, FL R+12
- Halcyondale, GA R+29
- Hallsburg, TX R+68
- Wynona, OK R+53
- Mackay, ID R+64
- Duluth, KY R+64
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.