48091 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 66% of adults in 48091 typically vote, near the U.S. average of about 62%. Among adults in 48091, ~38% vote Democratic, ~28% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 48091 compares
Among zip codes within 15 miles, 48091 leans more Democratic than 37 of 87 neighbors.
48091 runs about 18 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 48091 sits clearly on the Democratic side.
Politics vary noticeably by block within 48091. The southeast side is the most Democratic-leaning (D+39) and the west side is the least Democratic-leaning (D+4), a spread of about 35 points.
Why 48091 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 48091, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 48091 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in 48091 have never been married, above 87% of zip codes. 48091 runs against the grain of Michigan, a Democratic-leaning outlier in a roughly evenly split state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 48091, 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 48091 looks the way it does
Turnout in 48091 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.