Macomb County leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 81% of adults in Macomb County typically vote, above the U.S. average of about 62%. Among adults in Macomb County, ~36% vote Democratic, ~45% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Macomb County compares
Among counties within 50 miles, Macomb County leans more Republican than 4 of 7 neighbors.
Macomb County runs about 8 points more Republican than Michigan as a whole.
Politics vary noticeably by city within Macomb County. The south side runs the most Democratic (D+18) and the north side runs the most Republican (R+32), a spread of about 50 points.
Why Macomb County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Macomb County, not a ranked or complete list of what matters most.
Macomb County votes Republican even though it is densely developed (about 91%, far above the Michigan average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Macomb County, MI sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Macomb County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Macomb County 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Oakland County, MI D+14
- Wayne County, MI D+33
- St. Clair County, MI R+31
- Lapeer County, MI R+38
- Washtenaw County, MI D+44
- Livingston County, MI R+23
- Genesee County, MI D+8
- Sanilac County, MI R+46
- Monroe County, MI R+27
- Tuscola County, MI R+42
Counties with Similar Populations
- San Francisco County, CA D+61
- Hidalgo County, TX R+2
- El Paso County, TX D+15
- Essex County, NJ D+48
- Middlesex County, NJ D+11
- Worcester County, MA D+12
- Montgomery County, PA D+21
- Denton County, TX R+7
- Baltimore County, MD D+28
- Kern County, CA R+12
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.