Green River leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About more than 99% of adults in Green River typically vote, above the U.S. average of about 62%. Among adults in Green River, ~37% vote Democratic, ~65% Republican, and ~-2% don't vote. The map below shows estimated turnout by block group.
How Green River compares
Among cities within 25 miles, Green River leans more Republican than 28 of 75 neighbors.
Green River runs about 39 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Green River is one of the few Republican-leaning pockets.
Why Green River 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 Green River, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 89% of residents in Green River drive to work alone, about 15 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 76% of households in Green River are family households, above 78% of cities. Green River runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Green River, IL sits in the top quarter nationally 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 Green River looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Green River is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 70%, about 10 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in Green River own their home, about 21 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Green River have completed high school, above 98% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Colona, IL R+23
- Cleveland, IL R+27
- Osborn, IL R+24
- Green Rock, IL R+21
- Osco, IL R+44
- Barstow, IL R+22
- Carbon Cliff, IL Even
- Geneseo, IL R+20
- Sunny Hill, IL R+33
- Joslin, IL R+27
Cities with Similar Populations
- Dazey, ND R+53
- Millwood, VA R+17
- Pireway, NC R+43
- Knittel, IA R+48
- Cruz Calle, TX R+11
- Schoenchen, KS R+69
- Grays Corner, MD R+8
- Scott, OK R+72
- Glendale, SC R+43
- Jordan, IA R+25
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.