New Dennison is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 78% of adults in New Dennison typically vote, above the U.S. average of about 62%. Among adults in New Dennison, ~16% vote Democratic, ~62% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How New Dennison compares
Among cities within 25 miles, New Dennison leans more Republican than 47 of 92 neighbors.
New Dennison runs about 68 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while New Dennison is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within New Dennison. The southwest side is the most Republican-leaning (R+64) and the north side is the least Republican-leaning (R+52), a spread of about 12 points.
Why New Dennison 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 New Dennison, not a ranked or complete list of what matters most.
New Dennison votes against the grain of Illinois. Illinois leans Democratic overall, while New Dennison runs about 68 points more Republican. A high family-household share predicts Republican voting, and about 77% of households in New Dennison are family households, above 83% 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 New Dennison, IL does.
Why turnout in New Dennison looks the way it does
Turnout in New Dennison 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 Cities
- Crab Orchard, IL R+66
- Creal Springs, IL R+58
- Marion, IL R+31
- Spillertown, IL R+47
- Pittsburg, IL R+62
- Hudgens, IL R+44
- Whiteash, IL R+51
- Stonefort, IL R+66
- New Burnside, IL R+59
Cities with Similar Populations
- Pardee, WV R+73
- Labolt, SD R+53
- Fandon, IL R+50
- Martha, OK R+72
- Moose Pass, AK R+37
- Springdale, IA R+37
- New Baden, TX R+59
- Pentz, CA R+36
- Tangier, IN R+61
- Harlan Crossroads, KY R+63
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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.