Chesterfield is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 77% of adults in Chesterfield typically vote, above the U.S. average of about 62%. Among adults in Chesterfield, ~17% vote Democratic, ~60% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Chesterfield compares
Among cities within 25 miles, Chesterfield leans more Republican than 51 of 71 neighbors.
Chesterfield runs about 66 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Chesterfield is one of the few Republican-leaning pockets.
Why Chesterfield 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 Chesterfield, not a ranked or complete list of what matters most.
Chesterfield votes against the grain of Illinois. Illinois leans Democratic overall, while Chesterfield runs about 66 points more Republican.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Chesterfield, 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 Chesterfield looks the way it does
Homeowners vote more often than renters. About 97% of households in Chesterfield own their home, about 17 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hagaman, IL R+56
- Enos, IL R+57
- Plainview, IL R+53
- Comer, IL R+56
- Medora, IL R+57
- Hettick, IL R+60
- Rockbridge, IL R+68
- Shipman, IL R+53
- Greenfield, IL R+65
Cities with Similar Populations
- Neosheo, KY R+61
- Napakiak, AK D+19
- Glenford, NY D+42
- New Market, MN R+32
- Weal, VA R+30
- Rover, AR R+71
- Tina, MO R+67
- Norris, MS R+31
- Sandfordville, NY R+34
- Sandlick, WV R+70
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.