New Lenox leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 93% of adults in New Lenox typically vote, above the U.S. average of about 62%. Among adults in New Lenox, ~36% vote Democratic, ~57% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How New Lenox compares
Among cities within 25 miles, New Lenox leans more Republican than 105 of 136 neighbors.
New Lenox runs about 32 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while New Lenox is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within New Lenox. The northeast side is the most Republican-leaning (R+28) and the northwest side is the least Republican-leaning (R+17), a spread of about 11 points.
Why New Lenox 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 New Lenox, not a ranked or complete list of what matters most.
New Lenox votes Republican even though it is densely developed (about 71%, far 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 82% of households in New Lenox are family households, above 93% of cities. New Lenox runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as New Lenox, IL does.
Why turnout in New Lenox looks the way it does
Areas with strong routine healthcare access turn out at higher rates. New Lenox 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 72%, about 12 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 93% of households in New Lenox own their home, about 18 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in New Lenox have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Mokena, IL R+17
- Manhattan, IL R+30
- Frankfort, IL R+7
- Lockport, IL R+12
- Homer Glen, IL R+27
- Rockdale, IL D+4
- Joliet, IL D+22
- Frankfort Square, IL R+13
- Elwood, IL R+30
- Orland Hills, IL Even
Cities with Similar Populations
- Franklin, WI R+6
- Kearns, UT D+3
- Middle River, MD D+14
- Okeechobee, FL R+46
- Somerset, NJ D+38
- Oakville, MO R+12
- Elizabethton, TN R+58
- Egypt Lake-Leto, FL R+5
- Hyde Park, MA D+59
- Camas, WA D+11
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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.