Alsip leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 63% of adults in Alsip typically vote, near the U.S. average of about 62%. Among adults in Alsip, ~36% vote Democratic, ~26% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Alsip compares
Among cities within 25 miles, Alsip leans more Democratic than 73 of 144 neighbors.
Alsip runs about 6 points more Democratic than Illinois as a whole.
Politics vary noticeably by neighborhood within Alsip. The southeast side runs the most Democratic (D+46) and the west side runs the most Republican (R+3), a spread of about 49 points.
Why Alsip 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 Alsip, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in Alsip live in densely developed areas, about 62 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in Alsip have never been married, above 92% of cities.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Alsip, IL sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Alsip looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Alsip is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Merrionette Park, IL D+17
- Crestwood, IL D+5
- Robbins, IL D+77
- Blue Island, IL D+46
- Oak Lawn, IL D+2
- Chicago Ridge, IL R+3
- Palos Heights, IL R+8
- Midlothian, IL D+11
- Worth, IL R+13
- Evergreen Park, IL D+31
Cities with Similar Populations
- Hanahan, SC R+19
- Jackson, GA R+43
- Ionia, MI R+15
- Connersville, IN R+53
- Canton, MS D+47
- Iselin, NJ D+2
- Germantown, WI R+13
- Mayfield Heights, OH D+21
- Forest Park, OH D+58
- Madison, IN R+39
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.