48320 leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 84% of adults in 48320 typically vote, above the U.S. average of about 62%. Among adults in 48320, ~46% vote Democratic, ~38% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How 48320 compares
Among zip codes within 15 miles, 48320 leans more Democratic than 31 of 66 neighbors.
48320 runs about 11 points more Democratic than Michigan as a whole.
Why 48320 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 48320, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 81% of residents in 48320 live in densely developed areas, about 45 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 48320 sits in the top quarter (about 46%, above 86% of zip codes).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 48320, MI sits in the top quarter 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 48320 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48320 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in 48320 have completed high school, above 97% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Michigan Department of State, 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.