61771 leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 77% of adults in 61771 typically vote, above the U.S. average of about 62%. Among adults in 61771, ~19% vote Democratic, ~58% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How 61771 compares
Among zip codes within 15 miles, 61771 leans more Republican than 8 of 12 neighbors.
61771 runs about 61 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61771 is one of the few Republican-leaning pockets.
Why 61771 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 61771, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 87% of residents in 61771 drive to work alone, about 14 points above the U.S. average of 74%. 61771 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as 61771, IL does.
Why turnout in 61771 looks the way it does
Homeowners vote more often than renters. About 90% of households in 61771 own their home, about 11 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 98% of adults in 61771 have completed high school, above 93% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.