North Barrington, IL Political Map | Democrat & Republican Areas in North Barrington

By the BestNeighborhood data science team. Last updated May 2026.

North Barrington leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.

 

About 96% of adults in North Barrington typically vote, above the U.S. average of about 62%. Among adults in North Barrington, ~51% vote Democratic, ~45% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.

How North Barrington compares

Among cities within 25 miles, North Barrington leans more Democratic than 89 of 167 neighbors.

North Barrington runs about 4 points more Republican than Illinois as a whole.

Politics vary noticeably by neighborhood within North Barrington. The southeast side is the most Democratic-leaning (D+13) and the northeast side is the least Democratic-leaning (Even), a spread of about 12 points.

Why North Barrington 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 North Barrington, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 73% of adults in North Barrington hold a bachelor's degree, about 44 points above the U.S. average of 28%. Dense areas vote Democratic, and North Barrington sits in the top fifth on density (about 71%, above 92% of cities).

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; North Barrington, 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 North Barrington looks the way it does

Areas with strong routine healthcare access turn out at higher rates. North Barrington 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 76%, about 16 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in North Barrington own their home, about 20 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in North Barrington have completed high school, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.