48377 leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 76% of adults in 48377 typically vote, above the U.S. average of about 62%. Among adults in 48377, ~46% vote Democratic, ~30% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 48377 compares
Among zip codes within 15 miles, 48377 leans more Democratic than 34 of 53 neighbors.
48377 runs about 21 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 48377 sits clearly on the Democratic side.
Politics vary noticeably by block within 48377. The northwest side is the most Democratic-leaning (D+25) and the southeast side is the least Democratic-leaning (D+12), a spread of about 13 points.
Why 48377 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 48377, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 57% of adults in 48377 hold a bachelor's degree, about 28 points above the U.S. average of 28%. Density combined with diversity predicts Democratic voting, and non-Hispanic white share in 48377 is about 55%, about 17 points below the U.S. average of 72%. 48377 runs against the grain of Michigan, a Democratic-leaning outlier in a roughly evenly split state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 48377, MI sits in the top quarter nationally on this measure.
Why turnout in 48377 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48377 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%. 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.