Glen Ellyn, IL Political Map | Democrat & Republican Areas in Glen Ellyn

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

Glen Ellyn leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.

 

About 84% of adults in Glen Ellyn typically vote, above the U.S. average of about 62%. Among adults in Glen Ellyn, ~51% vote Democratic, ~33% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.

How Glen Ellyn compares

Among cities within 25 miles, Glen Ellyn leans more Democratic than 136 of 178 neighbors.

Glen Ellyn runs about 11 points more Democratic than Illinois as a whole.

Politics vary noticeably by neighborhood within Glen Ellyn. The west side is the most Democratic-leaning (D+26) and the south side is the least Democratic-leaning (D+16), a spread of about 10 points.

Why Glen Ellyn 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 Glen Ellyn, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 95% of residents in Glen Ellyn live in densely developed areas, about 59 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Glen Ellyn sits in the top quarter (about 64%, above 97% of cities).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Glen Ellyn, IL sits in the top tenth 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 Glen Ellyn looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Glen Ellyn 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 73%, about 13 points above the U.S. average of 60%. 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.