Peoria Heights leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 72% of adults in Peoria Heights typically vote, above the U.S. average of about 62%. Among adults in Peoria Heights, ~40% vote Democratic, ~32% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Peoria Heights compares
Among cities within 25 miles, Peoria Heights leans more Democratic than 78 of 80 neighbors.
Politically, Peoria Heights sits close to the rest of Illinois.
Politics vary noticeably by neighborhood within Peoria Heights. The northwest side is the most Democratic-leaning (D+18) and the west side is the least Democratic-leaning (D+3), a spread of about 16 points.
Why Peoria Heights 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 Peoria Heights, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 71% of residents in Peoria Heights live in densely developed areas, about 35 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Peoria Heights sits in the top quarter (about 32%, above 77% of cities). A high never-married share predicts Democratic voting, and about 37% of adults in Peoria Heights have never been married, above 90% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Peoria Heights, IL sits in the top tenth nationally on this measure.
Why turnout in Peoria Heights looks the way it does
Turnout in Peoria Heights 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
- Peoria, IL D+31
- West Peoria, IL D+26
- Harvard Hills, IL R+23
- Bay View Gardens, IL R+38
- East Peoria, IL R+23
- Mossville, IL R+9
- Germantown Hills, IL R+26
- Spring Bay, IL R+42
- Bellevue, IL R+14
- Dunlap, IL R+7
Cities with Similar Populations
- Iowa Colony, TX D+5
- Snyderville, UT D+36
- North Grafton, MA D+11
- Kirtland, OH R+21
- Daleville, AL R+36
- Fairmont, NC Even
- Huntington, TX R+79
- Cross Plains, WI D+25
- Gas City, IN R+46
- Poughquag, NY R+23
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.