Frankfort Square, IL Political Map | Democrat & Republican Areas in Frankfort Square

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

Frankfort Square leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.

 

About 85% of adults in Frankfort Square typically vote, above the U.S. average of about 62%. Among adults in Frankfort Square, ~37% vote Democratic, ~48% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.

How Frankfort Square compares

Among cities within 25 miles, Frankfort Square leans more Republican than 107 of 138 neighbors.

Frankfort Square runs about 23 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Frankfort Square is one of the few Republican-leaning pockets.

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

Frankfort Square votes Republican even though it is densely developed (about 88%, far above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 88% of households in Frankfort Square are family households, above 98% of cities. Frankfort Square runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Frankfort Square, IL sits in the top tenth nationally on this measure.

Why turnout in Frankfort Square looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Frankfort Square 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 72%, about 12 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in Frankfort Square own their home, about 20 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Frankfort Square have completed high school, above 86% 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.