Manchester is a Republican stronghold. About 17% of voters here vote Democratic and 83% Republican.
About 67% of adults in Manchester typically vote, near the U.S. average of about 62%. Among adults in Manchester, ~11% vote Democratic, ~56% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Manchester compares
Among cities within 25 miles, Manchester leans more Republican than 45 of 60 neighbors.
Manchester runs about 76 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Manchester is one of the few Republican-leaning pockets.
Why Manchester 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 Manchester, not a ranked or complete list of what matters most.
Manchester votes against the grain of Illinois. Illinois leans Democratic overall, while Manchester runs about 76 points more Republican.
Park access and Republican lean
Places with low park coverage tend to lean Republican; Manchester, IL sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Manchester looks the way it does
Homeowners vote more often than renters. About 90% of households in Manchester 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
- Roodhouse, IL R+49
- Barrow, IL R+67
- Murrayville, IL R+55
- Nortonville, IL R+57
- Alsey, IL R+66
- Woodson, IL R+54
- Glasgow, IL R+66
- White Hall, IL R+44
- Lynnville, IL R+50
- Patterson, IL R+65
Cities with Similar Populations
- Indian Town, VA R+38
- Quitsna, NC D+54
- Orchard, CO R+68
- Loma Mar, CA D+52
- Sheppton, PA R+48
- Quinerly, NC R+23
- Georgeville, MN R+56
- Dresden, NY R+20
- Potash, AL R+81
- Talma, IN R+61
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.