Andalusia leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 83% of adults in Andalusia typically vote, above the U.S. average of about 62%. Among adults in Andalusia, ~32% vote Democratic, ~51% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Andalusia compares
Among cities within 25 miles, Andalusia leans more Republican than 16 of 76 neighbors.
Andalusia runs about 32 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Andalusia is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Andalusia. The southeast side is the most Republican-leaning (R+27) and the north side is the least Republican-leaning (R+17), a spread of about 11 points.
Why Andalusia 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 Andalusia, not a ranked or complete list of what matters most.
Andalusia votes against the grain of Illinois. Illinois leans Democratic overall, while Andalusia runs about 32 points more Republican. Dense places usually vote Democratic, but Andalusia runs against that pattern.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Andalusia, IL sits in the top quarter nationally on this measure.
Why turnout in Andalusia looks the way it does
Homeowners vote more often than renters. About 91% of households in Andalusia own their home, about 11 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 97% of adults in Andalusia have completed high school, above 89% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Buffalo, IA R+26
- Taylor Ridge, IL R+32
- Blue Grass, IA R+28
- Montpelier, IA R+28
- Reynolds, IL R+38
- Milan, IL R+9
- Oak Grove, IL R+20
- Rock Island, IL D+29
- New Era, IA R+27
- Buffalo Prairie, IL R+40
Cities with Similar Populations
- Bayard, NE R+63
- Crofton, NE R+66
- Love, MS R+67
- Evergreen, NC R+41
- Ethel, WA R+45
- Clarktown, NJ R+16
- Montgomery, LA R+75
- Nanawale Estates, HI D+22
- Dunkerton, IA R+39
- Boswell, OK R+62
All Local Stats
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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.