Marine City leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 90% of adults in Marine City typically vote, above the U.S. average of about 62%. Among adults in Marine City, ~31% vote Democratic, ~59% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Marine City compares
Among cities within 25 miles, Marine City leans more Republican than 13 of 38 neighbors.
Marine City runs about 31 points more Republican than Michigan as a whole.
Politics vary noticeably by neighborhood within Marine City. The northwest side is the most Republican-leaning (R+42) and the southeast side is the least Republican-leaning (R+20), a spread of about 22 points.
Why Marine City leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Marine City, not a ranked or complete list of what matters most.
Marine City votes Republican even though it is densely developed (about 41%, modestly above the Michigan average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Marine City, MI sits in the top quarter nationally on this measure.
Why turnout in Marine City looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Marine City 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 Cities
- Peters, MI R+47
- Four Towns, MI R+37
- East China, MI R+40
- Algonac, MI R+33
- Roberts Landing, MI R+39
- Pearl Beach, MI R+30
- Fair Haven, MI R+36
- Harsens Island, MI R+33
- Casco, MI R+45
- St. Clair, MI R+33
Cities with Similar Populations
- Ulysses, KS R+58
- Youngtown, AZ R+11
- Many, LA R+42
- Ranchos de Taos, NM D+34
- Greenup, KY R+57
- Tallulah, LA D+35
- Millersville, TN R+46
- Albany, KY R+71
- Girard, PA R+22
- Greenville, KY R+48
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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.