Frontenac leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 55% of adults in Frontenac typically vote, below the U.S. average of about 62%. Among adults in Frontenac, ~35% vote Democratic, ~20% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How Frontenac compares
Frontenac runs about 15 points more Democratic than Illinois as a whole.
Why Frontenac leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Frontenac. The lean here lands roughly where demographic data alone would predict.
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; Frontenac, Aurora, IL sits in the top quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Frontenac looks the way it does
Crowded housing lines up with lower turnout. About 8% of homes in Frontenac have more than one occupant per room, above 87% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Tall Grass, Naperville, IL D+19
- Randall Hills, North Aurora, IL D+13
- Valley View, Glen Ellyn, IL D+5
- Belmont, Downers Grove, IL D+19
- Lace, Darien, IL D+6
- Lakewood Springs, Plano, IL Even
- Yorkfield, Elmhurst, IL D+16
- Thornwood, South Elgin, IL R+4
- Elgin Historic District, Elgin, IL D+38
- Maple Manor, Elgin, IL D+24
Neighborhoods with Similar Populations
- Longbrook Estates, Bessemer, AL D+75
- Riverside, Spokane, WA D+33
- Riviera-Westchester, Bakersfield, CA R+10
- Greenfield Courthouse Square Historic District, Greenfield, R+35
- Whipper Barnoy, North Charleston, SC D+74
- Denver Harbor-Port Houston, Houston, TX D+29
- West Rancho Domingues, Compton, CA D+61
- Washington Avenue-Memorial Park, Houston, TX D+23
- Saint Anthony, New Orleans, LA D+72
- Meadowood, Madison, WI D+62
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.