Louisville is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 65% of adults in Louisville typically vote, near the U.S. average of about 62%. Among adults in Louisville, ~11% vote Democratic, ~54% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Louisville compares
Among cities within 25 miles, Louisville leans more Republican than 19 of 53 neighbors.
Louisville runs about 79 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Louisville is one of the few Republican-leaning pockets.
Why Louisville 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 Louisville, not a ranked or complete list of what matters most.
Louisville votes against the grain of Illinois. Illinois leans Democratic overall, while Louisville runs about 79 points more Republican. A high white share with below-average college attainment predicts Republican voting, and Louisville fits that profile on both counts.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; Louisville, IL sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Louisville looks the way it does
Turnout in Louisville 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 Cities
- Iola, IL R+70
- Riffle, IL R+70
- Hord, IL R+71
- Sailor Springs, IL R+71
- Flora, IL R+56
- Oskaloosa, IL R+73
- Ingraham, IL R+70
- Eberle, IL R+80
- Clay City, IL R+70
- Edgewood, IL R+68
Cities with Similar Populations
- Madbury, NH D+12
- Mentmore, NM D+24
- Belvedere-Tiburon, CA D+42
- Norris City, IL R+62
- Hudson, IN R+55
- Park City, KY R+58
- La Fontaine, IN R+55
- Sherwood Forest, GA R+68
- Kirkland, IL R+32
- Crows Landing, CA R+34
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.