Holiday Hills leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 81% of adults in Holiday Hills typically vote, above the U.S. average of about 62%. Among adults in Holiday Hills, ~35% vote Democratic, ~46% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Holiday Hills compares
Among cities within 25 miles, Holiday Hills leans more Republican than 105 of 145 neighbors.
Holiday Hills runs about 24 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Holiday Hills is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Holiday Hills. The west side is the most Republican-leaning (R+21) and the east side is the least Republican-leaning (R+8), a spread of about 14 points.
Why Holiday Hills 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 Holiday Hills, not a ranked or complete list of what matters most.
Holiday Hills votes Republican even though it is densely developed (about 41%, modestly above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Holiday Hills 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; Holiday Hills, IL sits in the top quarter nationally on this measure.
Why turnout in Holiday Hills looks the way it does
Homeowners vote more often than renters. About 91% of households in Holiday Hills own their home, about 12 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Island Lake, IL R+8
- Prairie Grove, IL R+10
- Lakemoor, IL R+12
- Oakwood Hills, IL R+10
- Mchenry, IL R+10
- Port Barrington, IL R+6
- Volo, IL Even
- Wauconda, IL Even
- Cary, IL Even
- McCullom Lake, IL R+12
Cities with Similar Populations
- Plum Springs, KY R+30
- Helenville, WI R+40
- Holiday Manor, FL R+22
- Buffalo Lake, MN R+57
- Vega, TX R+72
- Rocky Ridge, MD R+49
- Mixon, TX R+84
- Stoutland, MO R+72
- Westminster, VT D+22
- Lyle, WA 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.