Tinley Park is a true toss-up. About 48% of voters here vote Democratic and 52% Republican.
About 80% of adults in Tinley Park typically vote, above the U.S. average of about 62%. Among adults in Tinley Park, ~38% vote Democratic, ~41% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Tinley Park compares
Among cities within 25 miles, Tinley Park leans more Republican than 104 of 143 neighbors.
Tinley Park runs about 15 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Tinley Park is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Tinley Park. The southeast side runs the most Democratic (D+7) and the west side runs the most Republican (R+10), a spread of about 17 points.
Why Tinley 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 Tinley Park, not a ranked or complete list of what matters most.
Tinley Park votes against the grain of Illinois. Illinois leans Democratic overall, while Tinley Park runs about 15 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Tinley Park, 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 Tinley Park looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Tinley Park 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%. High high-school completion lines up with higher turnout, and about 96% of adults in Tinley Park have completed high school, above 82% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Orland Hills, IL Even
- Oak Forest, IL Even
- Frankfort Square, IL R+13
- Orland Park, IL R+9
- Country Club Hills, IL D+79
- Mokena, IL R+17
- Matteson, IL D+70
- Midlothian, IL D+11
- Crestwood, IL D+5
- Hazel Crest, IL D+80
Cities with Similar Populations
- Hollister, CA D+13
- Hacienda Heights, CA D+15
- Catalina Foothills, AZ D+20
- Oak Park, IL D+78
- Fuquay-Varina, NC R+4
- Diamond Bar, CA D+11
- Hialeah Gardens, FL R+43
- Peabody, MA D+4
- Redford, MI D+49
- Covington, LA R+39
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.