Northfield leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 89% of adults in Northfield typically vote, above the U.S. average of about 62%. Among adults in Northfield, ~56% vote Democratic, ~33% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Northfield compares
Among cities within 25 miles, Northfield leans more Democratic than 102 of 137 neighbors.
Northfield runs about 15 points more Democratic than Illinois as a whole.
Why Northfield 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 Northfield, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 79% of adults in Northfield hold a bachelor's degree, about 51 points above the U.S. average of 28%. Dense areas vote Democratic, and Northfield sits in the top fifth on density (about 81%, above 94% of cities).
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Northfield, IL sits in the top tenth 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 Northfield looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Northfield 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 77%, about 17 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in Northfield have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Winnetka, IL D+36
- Glencoe, IL D+47
- Glenview, IL D+21
- Golf, IL D+33
- Wilmette, IL D+50
- Kenilworth, IL D+30
- Glenview Nas, IL D+26
- Northbrook, IL D+32
- Morton Grove, IL D+13
- Skokie, IL D+27
Cities with Similar Populations
- Pelham Manor, NY D+30
- Willow Springs, IL R+12
- South Brooksville, FL R+28
- Bernville, PA R+42
- Richlands, VA R+57
- Palermo, CA R+34
- Bono, AR R+59
- Sandia Park, NM Even
- Greenwood, DE R+43
- Spring Arbor, MI R+23
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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.