Seville leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 83% of adults in Seville typically vote, above the U.S. average of about 62%. Among adults in Seville, ~22% vote Democratic, ~61% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Seville compares
Among cities within 25 miles, Seville leans more Republican than 42 of 64 neighbors.
Seville runs about 60 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Seville is one of the few Republican-leaning pockets.
Why Seville 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 Seville, not a ranked or complete list of what matters most.
Seville votes against the grain of Illinois. Illinois leans Democratic overall, while Seville runs about 60 points more Republican. Car-dependent areas vote Republican, and about 86% of residents in Seville drive to work alone, above 85% of cities.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Seville, IL sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Seville looks the way it does
Homeowners vote more often than renters. About 90% of households in Seville own their home, about 11 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Smithfield, IL R+50
- Marietta, IL R+50
- Cuba, IL R+38
- New Philadelphia, IL R+50
- Ellisville, IL R+51
- Fiatt, IL R+41
- Ipava, IL R+50
- Table Grove, IL R+51
- Lewistown, IL R+41
- Bushnell, IL R+38
Cities with Similar Populations
- Espanola, WA R+35
- Keyapaha, SD R+31
- Norman, GA R+27
- Saline City, IN R+62
- Kilbourn, IA R+57
- Carp, MN R+40
- Kiva, MI R+27
- Lovewell, KS R+74
- Utting, AZ R+55
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.