48138 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About more than 99% of adults in 48138 typically vote, above the U.S. average of about 62%. Among adults in 48138, ~44% vote Democratic, ~56% Republican, and ~0% don't vote. The map below shows estimated turnout by block group.
How 48138 compares
Among zip codes within 15 miles, 48138 leans more Republican than 22 of 28 neighbors.
48138 runs about 12 points more Republican than Michigan as a whole.
Why 48138 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 48138. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 48138, MI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 48138 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48138 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 78%, about 18 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in 48138 own their home, compared to around 75% in nearby zip codes. High high-school completion lines up with higher turnout, and about 97% of adults in 48138 have completed high school, above 88% 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.