Round Lake Park, IL Political Map | Democrat & Republican Areas in Round Lake Park

By the BestNeighborhood data science team. Last updated May 2026.

Round Lake Park leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.

 

About 64% of adults in Round Lake Park typically vote, near the U.S. average of about 62%. Among adults in Round Lake Park, ~37% vote Democratic, ~27% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.

How Round Lake Park compares

Among cities within 25 miles, Round Lake Park leans more Democratic than 102 of 138 neighbors.

Round Lake Park runs about 5 points more Democratic than Illinois as a whole.

Politics vary noticeably by neighborhood within Round Lake Park. The northwest side is the most Democratic-leaning (D+20) and the southeast side is the least Democratic-leaning (D+8), a spread of about 12 points.

Why Round Lake Park 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 Round Lake Park, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 70% of residents in Round Lake Park live in densely developed areas, about 33 points above the U.S. average of 36%.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Round Lake Park, IL sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in Round Lake Park looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Round Lake Park 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.

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.