Flat Rock is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 77% of adults in Flat Rock typically vote, above the U.S. average of about 62%. Among adults in Flat Rock, ~14% vote Democratic, ~63% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Flat Rock compares
Among cities within 25 miles, Flat Rock leans more Republican than 49 of 62 neighbors.
Flat Rock runs about 75 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Flat Rock is one of the few Republican-leaning pockets.
Why Flat Rock 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 Flat Rock, not a ranked or complete list of what matters most.
Flat Rock votes against the grain of Illinois. Illinois leans Democratic overall, while Flat Rock runs about 75 points more Republican. A high white share with below-average college attainment predicts Republican voting, and Flat Rock fits that profile on both counts.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Flat Rock, IL sits in the top quarter nationally on this measure.
Why turnout in Flat Rock looks the way it does
Homeowners vote more often than renters. About 93% of households in Flat Rock own their home, about 13 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Port Jackson, IL R+65
- Heathsville, IL R+67
- New Hebron, IL R+61
- Pinkstaff, IL R+60
- Palestine, IL R+51
- Robinson, IL R+41
- Russellville, IL R+61
- Petrolia, IL R+62
Cities with Similar Populations
- Balsam Lake, WI R+34
- Clements, CA R+51
- Mangham, LA R+73
- Asherton, TX D+4
- Waterford, VT R+5
- Alpena Junction, MI R+33
- Dornsife, PA R+67
- Oregon, MO R+60
- Gilbert, LA R+70
- Highfalls, GA R+58
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.