Forest Park is a Democratic stronghold. About 83% of voters here vote Democratic and 17% Republican.
About 63% of adults in Forest Park typically vote, near the U.S. average of about 62%. Among adults in Forest Park, ~52% vote Democratic, ~11% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How Forest Park compares
Among cities within 25 miles, Forest Park leans more Democratic than 141 of 160 neighbors.
Forest Park runs about 56 points more Democratic than Illinois as a whole.
Politics vary noticeably by neighborhood within Forest Park. The northwest side is the most Democratic-leaning (D+73) and the southwest side is the least Democratic-leaning (D+60), a spread of about 14 points.
Why Forest Park 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 Forest Park, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in Forest Park live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Forest Park sits in the top quarter (about 51%, above 94% of cities). A high never-married share predicts Democratic voting, and about 44% of adults in Forest Park have never been married, above 96% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Forest Park, IL sits in the top tenth nationally on this measure.
Why turnout in Forest Park looks the way it does
Turnout in Forest Park 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.
Nearby Cities
- Oak Park, IL D+78
- River Forest, IL D+55
- Hines, IL D+73
- Maywood, IL D+74
- North Riverside, IL D+18
- Berwyn, IL D+37
- Broadview, IL D+72
- Riverside, IL D+39
- Cicero, IL D+34
- Elmwood Park, IL D+19
Cities with Similar Populations
- Marinette, WI R+22
- Atmore, AL R+16
- Justice, IL D+4
- Greencastle, IN R+35
- Van Wert, OH R+48
- Fort Gratiot, MI R+25
- Bellair-Meadowbrook Terrace, FL R+8
- Smithfield, RI Even
- Saraland, AL R+50
- North Adams, MA D+19
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.