McCullom Lake leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 66% of adults in McCullom Lake typically vote, near the U.S. average of about 62%. Among adults in McCullom Lake, ~29% vote Democratic, ~37% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How McCullom Lake compares
Among cities within 25 miles, McCullom Lake leans more Republican than 87 of 141 neighbors.
McCullom Lake runs about 22 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while McCullom Lake is one of the few Republican-leaning pockets.
Why McCullom Lake 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 McCullom Lake, not a ranked or complete list of what matters most.
McCullom Lake votes Republican even though it is densely developed (about 48%, well above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 77% of households in McCullom Lake are family households, above 81% of cities. McCullom Lake runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; McCullom Lake, 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 McCullom Lake looks the way it does
Areas with limited routine healthcare access turn out at lower rates. McCullom Lake is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Mchenry, IL R+10
- Ringwood, IL R+25
- Johnsburg, IL R+19
- Wonder Lake, IL R+17
- Bull Valley, IL R+16
- Pistakee Highlands, IL R+14
- Lakemoor, IL R+12
- Greenwood, IL R+31
- Solon Mills, IL R+20
- Holiday Hills, IL R+13
Cities with Similar Populations
- North Hills, WV R+35
- Fallentimber, PA R+61
- Millersburg, KY R+56
- Worden, MT R+65
- Huston, ID R+67
- McGrady, NC R+69
- Moores, GA R+32
- Fairmount, IL R+56
- Flint Hill, NC R+63
- Lake Arthur, NM R+66
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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.