Harris leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 92% of adults in Harris typically vote, above the U.S. average of about 62%. Among adults in Harris, ~27% vote Democratic, ~65% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.
How Harris compares
Among cities within 25 miles, Harris leans more Republican than 29 of 62 neighbors.
Harris runs about 54 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Harris is one of the few Republican-leaning pockets.
Why Harris 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 Harris, not a ranked or complete list of what matters most.
Harris votes against the grain of Illinois. Illinois leans Democratic overall, while Harris runs about 54 points more Republican.
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 Harris, IL does.
Why turnout in Harris looks the way it does
Areas with high high-school completion turn out at higher rates. About 98% of adults in Harris have completed high school, about 6 points above the Illinois average of 92%. Homeowners vote more often than renters, and about 90% of households in Harris own their home, about 15 points above the U.S. average of 75%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Farmer City, IL R+46
- Kumler, IL R+47
- Mansfield, IL R+36
- Parnell, IL R+48
- Galesville, IL R+41
- DeLand, IL R+43
- Glen Avon, IL R+49
- Bellflower, IL R+53
- Sabina, IL R+48
- Osman, IL R+42
Cities with Similar Populations
- Elliston, IN R+52
- Tobico Beach, MI R+27
- Geneva, AR R+72
- Winona, AZ R+5
- Gaysville, VT D+15
- Nodaway, MO R+64
- Scotts Crossing, OH R+65
- Yarbro, AR R+22
- Caledonia, ND R+39
- Radnor, IN R+59
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.