Oak Grove leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 88% of adults in Oak Grove typically vote, above the U.S. average of about 62%. Among adults in Oak Grove, ~35% vote Democratic, ~53% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How Oak Grove compares
Among cities within 25 miles, Oak Grove leans more Republican than 15 of 77 neighbors.
Oak Grove runs about 30 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Oak Grove is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Oak Grove. The southwest side is the most Republican-leaning (R+34) and the north side is the least Republican-leaning (R+10), a spread of about 25 points.
Why Oak Grove 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 Oak Grove, not a ranked or complete list of what matters most.
Oak Grove votes against the grain of Illinois. Illinois leans Democratic overall, while Oak Grove runs about 30 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in Oak Grove are family households, above 79% of cities.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Oak Grove, IL sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Oak Grove looks the way it does
Homeowners vote more often than renters. About 96% of households in Oak Grove own their home, about 16 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 97% of adults in Oak Grove have completed high school, above 88% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Milan, IL R+9
- Preemption, IL R+33
- Rock Island, IL D+29
- Coal Valley, IL R+18
- Sunny Hill Estates, IL R+30
- Moline, IL D+16
- Reynolds, IL R+38
- Sherrard, IL R+29
- Andalusia, IL R+21
- Taylor Ridge, IL R+32
Cities with Similar Populations
- Lashmeet, WV R+72
- Clarence, PA R+61
- Esom Hill, GA R+71
- Riverside, UT R+73
- Athens, IN R+56
- Frame, WV R+55
- Bolt, WV R+72
- Piney Park, MO R+61
- Brixham, ME Even
- Provost, VA R+36
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.