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

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

Flossmoor is a Democratic stronghold. About 86% of voters here vote Democratic and 14% Republican.

 

About 90% of adults in Flossmoor typically vote, above the U.S. average of about 62%. Among adults in Flossmoor, ~78% vote Democratic, ~13% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.

How Flossmoor compares

Among cities within 25 miles, Flossmoor leans more Democratic than 118 of 134 neighbors.

Flossmoor runs about 61 points more Democratic than Illinois as a whole.

Politics vary noticeably by neighborhood within Flossmoor. The northwest side is the most Democratic-leaning (D+81) and the northeast side is the least Democratic-leaning (D+58), a spread of about 22 points.

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

Dense areas vote Democratic. About 98% of residents in Flossmoor live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Flossmoor sits in the top quarter (about 61%, above 97% of cities).

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Flossmoor, IL sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Flossmoor looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Flossmoor 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 69%, about 9 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in Flossmoor own their home, compared to around 75% in nearby cities. High high-school completion lines up with higher turnout, and about 99% of adults in Flossmoor 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.