48105 is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.
About 77% of adults in 48105 typically vote, above the U.S. average of about 62%. Among adults in 48105, ~62% vote Democratic, ~15% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How 48105 compares
Among zip codes within 15 miles, 48105 leans more Democratic than 23 of 25 neighbors.
48105 runs about 62 points more Democratic than Michigan as a whole. Michigan is roughly evenly split, and 48105 sits clearly on the Democratic side.
Politics vary noticeably by block within 48105. The southwest side is the most Democratic-leaning (D+77) and the northeast side is the least Democratic-leaning (D+19), a spread of about 59 points.
Why 48105 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 48105, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 82% of adults in 48105 hold a bachelor's degree, about 53 points above the U.S. average of 28%. Dense areas vote Democratic, and 48105 sits in the top fifth on density (about 77%, above 82% of zip codes). 48105 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; 48105, MI sits in the top quarter nationally on this measure.
Why turnout in 48105 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48105 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%. High high-school completion lines up with higher turnout, and about 98% of adults in 48105 have completed high school, above 95% 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.