Elgin, IL Political Map | Democrat & Republican Areas in Elgin

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

Elgin leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.

 

About 59% of adults in Elgin typically vote, near the U.S. average of about 62%. Among adults in Elgin, ~35% vote Democratic, ~24% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.

How Elgin compares

Among cities within 25 miles, Elgin leans more Democratic than 121 of 149 neighbors.

Elgin runs about 7 points more Democratic than Illinois as a whole.

Politics vary noticeably by neighborhood within Elgin. The east side is the most Democratic-leaning (D+28) and the northwest side is the least Democratic-leaning (Even), a spread of about 28 points.

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

Dense areas vote Democratic. About 88% of residents in Elgin live in densely developed areas, about 52 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 35% of adults in Elgin have never been married, above 86% of cities.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Elgin, 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 Elgin looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Elgin is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 20% of adults in Elgin report food insecurity, above 81% 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.