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

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

North Chicago is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.

 

About 40% of adults in North Chicago typically vote, below the U.S. average of about 62%. Among adults in North Chicago, ~32% vote Democratic, ~8% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.

How North Chicago compares

Among cities within 25 miles, North Chicago leans more Democratic than 109 of 110 neighbors.

North Chicago runs about 49 points more Democratic than Illinois as a whole.

Politics vary noticeably by neighborhood within North Chicago. The southeast side is the most Democratic-leaning (D+72) and the southwest side is the least Democratic-leaning (D+55), a spread of about 18 points.

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

Dense areas vote Democratic. About 91% of residents in North Chicago live in densely developed areas, about 55 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 51% of adults in North Chicago have never been married, above 98% of cities.

Preventive-care access and voter turnout

Places with limited routine preventive-care access tend to turn out at a lower rate; North Chicago, IL sits in the bottom 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 Chicago looks the way it does

Areas with limited routine healthcare access turn out at lower rates. North Chicago is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 45%, about 18 points below the Illinois average of 63%. Renters vote less often than owners, and about 55% of households in North Chicago rent, compared to around 30% in nearby cities. High food insecurity lines up with lower turnout, and about 39% of adults in North Chicago report food insecurity, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.

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.