Spring Grove leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 95% of adults in Spring Grove typically vote, above the U.S. average of about 62%. Among adults in Spring Grove, ~36% vote Democratic, ~59% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How Spring Grove compares
Among cities within 25 miles, Spring Grove leans more Republican than 102 of 136 neighbors.
Spring Grove runs about 34 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Spring Grove is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Spring Grove. The north side is the most Republican-leaning (R+28) and the southeast side is the least Republican-leaning (R+12), a spread of about 16 points.
Why Spring 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 Spring Grove, not a ranked or complete list of what matters most.
Spring Grove votes Republican even though it is densely developed (about 44%, modestly above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Spring Grove runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Spring Grove, IL sits in the top quarter nationally on this measure.
Why turnout in Spring Grove looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Spring Grove 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 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Spring Grove own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Spring Grove have completed high school, above 82% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Solon Mills, IL R+20
- Pistakee Highlands, IL R+14
- Richmond, IL R+14
- Fox Lake, IL R+11
- Johnsburg, IL R+19
- Wilmot, WI R+33
- Twin Lakes, WI R+27
- Ringwood, IL R+25
- Ingleside, IL R+5
Cities with Similar Populations
- Midland Park, NJ R+3
- Hawthorne, FL R+35
- Water Valley, MS R+30
- Browning, MT D+63
- Oyster Bay, NY R+13
- Sharpsville, PA R+25
- Fennville, MI R+18
- Hampstead, NH Even
- Frankenmuth, MI R+20
- Lacy-Lakeview, TX D+3
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.