Johnsburg leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 94% of adults in Johnsburg typically vote, above the U.S. average of about 62%. Among adults in Johnsburg, ~39% vote Democratic, ~55% Republican, and ~6% don't vote. The map below shows estimated turnout by block group.
How Johnsburg compares
Among cities within 25 miles, Johnsburg leans more Republican than 103 of 141 neighbors.
Johnsburg runs about 30 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Johnsburg is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Johnsburg. The west side is the most Republican-leaning (R+25) and the southwest side is the least Republican-leaning (R+11), a spread of about 14 points.
Why Johnsburg 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 Johnsburg, not a ranked or complete list of what matters most.
Johnsburg votes Republican even though it is densely developed (about 58%, well above the Illinois average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Johnsburg runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Johnsburg, IL sits in the top quarter nationally on this measure.
Why turnout in Johnsburg looks the way it does
Homeowners vote more often than renters. About 93% of households in Johnsburg own their home, about 13 points above the Illinois average of 80%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Pistakee Highlands, IL R+14
- McCullom Lake, IL R+12
- Fox Lake, IL R+11
- Ringwood, IL R+25
- Mchenry, IL R+10
- Lakemoor, IL R+12
- Spring Grove, IL R+23
- Solon Mills, IL R+20
- Ingleside, IL R+5
- Volo, IL Even
Cities with Similar Populations
- Terra Bella, CA R+15
- Barnesville, OH R+57
- Clinton, WA D+37
- Versailles, MO R+62
- Culloden, WV R+48
- Sturbridge, MA D+7
- Bethel Heights, AR R+20
- Lolo, MT R+17
- Taylor, PA R+2
- Bruceton Mills, WV R+45
All Local Stats
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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.