Swanwick is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 89% of adults in Swanwick typically vote, above the U.S. average of about 62%. Among adults in Swanwick, ~16% vote Democratic, ~73% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Swanwick compares
Among cities within 25 miles, Swanwick leans more Republican than 64 of 65 neighbors.
Swanwick runs about 75 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Swanwick is one of the few Republican-leaning pockets.
Why Swanwick 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 Swanwick, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Swanwick, more than 99% of residents are non-Hispanic white, about 27 points above the U.S. average of 72%; about 7% of adults hold a bachelor's degree, about 20 points below the Illinois average of 27%. Car-dependent areas vote Republican, and about 94% of residents in Swanwick drive to work alone, above 97% of cities. Swanwick runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Republican lean
Places with low population density tend to lean Republican; Swanwick, IL sits in the bottom quarter nationally on this measure.
Why turnout in Swanwick looks the way it does
Homeowners vote more often than renters. About 91% of households in Swanwick own their home, about 12 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Coulterville, IL R+51
- Winkle, IL R+64
- Eden, IL R+49
- Oakdale, IL R+58
- Tilden, IL R+53
- Sparta, IL R+32
- Clarmin, IL R+57
- Cutler, IL R+50
- Lively Grove, IL R+59
Cities with Similar Populations
- Kirk, KY R+62
- Mount Crest, TN R+73
- Shorewood, OR R+20
- Gentilly, MN R+47
- Warriormine, WV R+71
- Starks, WI R+31
- Connorsville, WI R+38
- West Unity, NH R+31
- Vanmeter Park, IN R+52
- Sunnydale, KS R+52
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.