Bloomingdale is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 71% of adults in Bloomingdale typically vote, above the U.S. average of about 62%. Among adults in Bloomingdale, ~35% vote Democratic, ~36% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How Bloomingdale compares
Among cities within 25 miles, Bloomingdale sits roughly in the middle of the political spectrum, with 56 neighbors leaning further in the place's direction and 128 leaning the other way.
Bloomingdale runs about 10 points more Republican than Illinois as a whole.
Politics vary noticeably by neighborhood within Bloomingdale. The southeast side runs the most Democratic (D+9) and the west side runs the most Republican (R+3), a spread of about 12 points.
Why Bloomingdale leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Bloomingdale. The lean here lands roughly where demographic data alone would predict.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Bloomingdale, IL sits in the top tenth nationally on this measure.
Why turnout in Bloomingdale looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Bloomingdale is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Medinah, IL R+4
- Roselle, IL Even
- Glendale Heights, IL D+14
- Carol Stream, IL D+10
- Itasca, IL R+6
- Hanover Park, IL D+14
- Addison, IL D+3
- Schaumburg, IL D+13
- Wood Dale, IL R+6
- Elk Grove Village, IL D+3
Cities with Similar Populations
- Round Lake, IL D+12
- Bonaire, GA R+18
- Burlington, WI R+18
- Nipomo, CA R+10
- Broadview Heights, OH R+6
- Canyon, TX R+52
- Willow Grove, PA D+28
- Secaucus, NJ D+8
- Heber City, UT R+34
- Birmingham, MI D+21
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.