49115 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 97% of adults in 49115 typically vote, above the U.S. average of about 62%. Among adults in 49115, ~56% vote Democratic, ~41% Republican, and ~3% don't vote. The map below shows estimated turnout by block group.
How 49115 compares
Among zip codes within 15 miles, 49115 leans more Democratic than 12 of 13 neighbors.
49115 runs about 17 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 49115 sits clearly on the Democratic side.
Why 49115 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 49115, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 47% of adults in 49115 hold a bachelor's degree, about 18 points above the U.S. average of 28%. 49115 runs against the grain of Michigan, a Democratic-leaning outlier in a roughly evenly split state.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as 49115, MI does.
Why turnout in 49115 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 49115 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 74%, about 14 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 94% of households in 49115 own their home, about 19 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in 49115 have completed high school, above 96% 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.