Long Grove leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 81% of adults in Long Grove typically vote, above the U.S. average of about 62%. Among adults in Long Grove, ~46% vote Democratic, ~35% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Long Grove compares
Among cities within 25 miles, Long Grove leans more Democratic than 103 of 165 neighbors.
Politically, Long Grove sits close to the rest of Illinois.
Politics vary noticeably by neighborhood within Long Grove. The east side is the most Democratic-leaning (D+24) and the southwest side is the least Democratic-leaning (D+6), a spread of about 18 points.
Why Long 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 Long Grove, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 74% of adults in Long Grove hold a bachelor's degree, about 46 points above the U.S. average of 28%. Dense areas vote Democratic, and Long Grove sits in the top fifth on density (about 76%, above 93% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Long Grove, IL sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Long Grove looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Long 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Long Grove have completed high school, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Indian Creek, IL D+25
- Kildeer, IL D+9
- Vernon Hills, IL D+28
- Buffalo Grove, IL D+25
- Hawthorn Woods, IL D+3
- Lincolnshire, IL D+28
- Lake Zurich, IL D+10
- Mundelein, IL D+18
- Deer Park, IL D+9
- Palatine, IL D+19
Cities with Similar Populations
- Wood-Ridge, NJ R+6
- Struthers, OH R+12
- Ward, AR R+63
- Ripon, WI R+21
- Tonganoxie, KS R+38
- Muskegon Heights, MI D+77
- Hull, MA D+15
- Fairfield, AL D+89
- Waynesboro, MS R+9
- Maywood, NJ D+8
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.