61871 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 82% of adults in 61871 typically vote, above the U.S. average of about 62%. Among adults in 61871, ~18% vote Democratic, ~64% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 61871 compares
Among zip codes within 15 miles, 61871 leans more Republican than 13 of 17 neighbors.
61871 runs about 67 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61871 is one of the few Republican-leaning pockets.
Why 61871 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 61871, not a ranked or complete list of what matters most.
61871 votes against the grain of Illinois. Illinois leans Democratic overall, while 61871 runs about 67 points more Republican.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 61871, IL does.
Why turnout in 61871 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 61871 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 61871 have completed high school, above 95% 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.