61913 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 83% of adults in 61913 typically vote, above the U.S. average of about 62%. Among adults in 61913, ~17% vote Democratic, ~65% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 61913 compares
Among zip codes within 15 miles, 61913 leans more Republican than 10 of 11 neighbors.
61913 runs about 69 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61913 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 61913. The northeast side is the most Republican-leaning (R+65) and the northwest side is the least Republican-leaning (R+51), a spread of about 14 points.
Why 61913 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 61913, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 61913, about 99% of residents are non-Hispanic white, about 26 points above the U.S. average of 72%; about 15% of adults hold a bachelor's degree, about 11 points below the Illinois average of 27%. 61913 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 61913, IL sits below the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 61913 looks the way it does
Turnout in 61913 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.