Prairie Du Rocher is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 75% of adults in Prairie Du Rocher typically vote, above the U.S. average of about 62%. Among adults in Prairie Du Rocher, ~16% vote Democratic, ~59% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Prairie Du Rocher compares
Among cities within 25 miles, Prairie Du Rocher leans more Republican than 45 of 71 neighbors.
Prairie Du Rocher runs about 68 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Prairie Du Rocher is one of the few Republican-leaning pockets.
Why Prairie Du Rocher 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 Prairie Du Rocher, not a ranked or complete list of what matters most.
Prairie Du Rocher votes against the grain of Illinois. Illinois leans Democratic overall, while Prairie Du Rocher runs about 68 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Prairie Du Rocher, IL sits near the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Prairie Du Rocher looks the way it does
Turnout in Prairie Du Rocher sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Ruma, IL R+57
- Renault, IL R+54
- Modoc, IL R+58
- Kidd, IL R+55
- Evansville, IL R+51
- Prairie, IL R+55
- Red Bud, IL R+51
- Tipton, IL R+52
- Fults, IL R+54
- Zell, MO R+57
Cities with Similar Populations
- Myton, UT R+84
- Ringling, OK R+72
- Falls City, OR R+30
- Clearbrook, MN R+59
- Norphlet, AR R+64
- Chestatee, GA R+52
- Macks Creek, MO R+70
- Derma, MS D+8
- Millsboro, OH R+47
- Edwards, MO R+64
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.