48703 leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 88% of adults in 48703 typically vote, above the U.S. average of about 62%. Among adults in 48703, ~30% vote Democratic, ~58% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 48703 compares
Among zip codes within 15 miles, 48703 is the least Republican-leaning.
48703 runs about 31 points more Republican than Michigan as a whole.
Why 48703 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 48703. 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; 48703, 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 48703 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 48703 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 63%, above 56% of zip codes. Homeowners vote more often than renters, and about 88% of households in 48703 own their home, above 82% 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.