48504 is a Democratic stronghold. About 83% of voters here vote Democratic and 17% Republican.
About 71% of adults in 48504 typically vote, above the U.S. average of about 62%. Among adults in 48504, ~59% vote Democratic, ~12% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 48504 compares
Among zip codes within 15 miles, 48504 leans more Democratic than 22 of 23 neighbors.
48504 runs about 67 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 48504 sits clearly on the Democratic side.
Politics vary noticeably by block within 48504. The north side is the most Democratic-leaning (D+91) and the northwest side is the least Democratic-leaning (D+29), a spread of about 62 points.
Why 48504 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 48504, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 48504 is about 24%, about 48 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 53% of adults in 48504 have never been married, above 96% of zip codes. 48504 runs against the grain of Michigan, a Democratic-leaning outlier in a roughly evenly split state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 48504, MI sits in the top quarter 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 48504 looks the way it does
Turnout in 48504 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.