48040 leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 93% of adults in 48040 typically vote, above the U.S. average of about 62%. Among adults in 48040, ~34% vote Democratic, ~59% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How 48040 compares
Among zip codes within 15 miles, 48040 leans more Republican than 2 of 10 neighbors.
48040 runs about 25 points more Republican than Michigan as a whole.
Why 48040 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 48040, not a ranked or complete list of what matters most.
48040 votes Republican even though it is densely developed (about 78%, far above the Michigan average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 48040, MI sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 48040 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48040 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 71%, about 11 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.