Swan Creek leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 63% of adults in Swan Creek typically vote, near the U.S. average of about 62%. Among adults in Swan Creek, ~17% vote Democratic, ~46% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How Swan Creek compares
Among cities within 25 miles, Swan Creek leans more Republican than 26 of 55 neighbors.
Swan Creek runs about 56 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Swan Creek is one of the few Republican-leaning pockets.
Why Swan Creek 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 Swan Creek, not a ranked or complete list of what matters most.
Swan Creek votes against the grain of Illinois. Illinois leans Democratic overall, while Swan Creek runs about 56 points more Republican. A high family-household share predicts Republican voting, and about 78% of households in Swan Creek are family households, above 85% of cities.
Population density and Republican lean
Places with low population density tend to lean Republican; Swan Creek, IL sits in the bottom quarter nationally on this measure.
Why turnout in Swan Creek looks the way it does
Turnout in Swan Creek 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
- Roseville, IL R+41
- Youngstown, IL R+48
- Walnut Grove, IL R+50
- Raritan, IL R+50
- Good Hope, IL R+49
- Greenbush, IL R+42
- Smithshire, IL R+46
- Sciota, IL R+42
- Media, IL R+51
- Berwick, IL R+45
Cities with Similar Populations
- Anton, CO R+78
- Arbacoochee, AL R+86
- Holcomb, IL R+34
- Kokomo, TX R+78
- Turkey River, IA R+37
- Tillman, IN R+55
- Marrs Center, IN R+46
- Lost Creek, WA R+48
- Thomasville, IL R+50
- Kimbrough, AL D+57
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.