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

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

Springfield leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.

 

About 71% of adults in Springfield typically vote, above the U.S. average of about 62%. Among adults in Springfield, ~40% vote Democratic, ~31% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.

How Springfield compares

Among cities within 25 miles, Springfield leans more Democratic than 67 of 69 neighbors.

Politically, Springfield sits close to the rest of Illinois.

Politics vary noticeably by neighborhood within Springfield. The east side runs the most Democratic (D+51) and the northeast side runs the most Republican (R+8), a spread of about 59 points.

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

Dense areas vote Democratic. About 81% of residents in Springfield live in densely developed areas, about 45 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Springfield sits in the top quarter (about 34%, above 81% of cities). A high never-married share predicts Democratic voting, and about 38% of adults in Springfield have never been married, above 91% of cities.

Walkability and Democratic lean

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

Turnout in Springfield sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.