49931 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 69% of adults in 49931 typically vote, above the U.S. average of about 62%. Among adults in 49931, ~46% vote Democratic, ~23% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 49931 compares
Among zip codes within 15 miles, 49931 is the most Democratic-leaning.
49931 runs about 33 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 49931 sits clearly on the Democratic side.
Politics vary noticeably by block within 49931. The northeast side runs the most Democratic (D+47) and the northwest side runs the most Republican (R+15), a spread of about 61 points.
Why 49931 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 49931, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 63% of adults in 49931 hold a bachelor's degree, about 34 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 67% of adults in 49931 have never been married, in the top fraction of zip codes. 49931 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; 49931, MI sits above the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 49931 looks the way it does
Turnout in 49931 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.