61751 is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 65% of adults in 61751 typically vote, near the U.S. average of about 62%. Among adults in 61751, ~15% vote Democratic, ~50% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How 61751 compares
Among zip codes within 15 miles, 61751 leans more Republican than 7 of 12 neighbors.
61751 runs about 65 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61751 is one of the few Republican-leaning pockets.
Why 61751 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 61751, not a ranked or complete list of what matters most.
61751 votes against the grain of Illinois. Illinois leans Democratic overall, while 61751 runs about 65 points more Republican. A high family-household share predicts Republican voting, and about 81% of households in 61751 are family households, above 93% of zip codes.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as 61751, IL does.
Why turnout in 61751 looks the way it does
Areas with high high-school completion turn out at higher rates. More than 99% of adults in 61751 have completed high school, about 7 points above the Illinois average of 92%. 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.