Harsens Island leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 89% of adults in Harsens Island typically vote, above the U.S. average of about 62%. Among adults in Harsens Island, ~29% vote Democratic, ~60% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Harsens Island compares
Among cities within 25 miles, Harsens Island leans more Republican than 26 of 46 neighbors.
Harsens Island runs about 32 points more Republican than Michigan as a whole.
Why Harsens Island leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Harsens Island. The lean here lands roughly where demographic data alone would predict.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Harsens Island, MI sits in the top tenth nationally on this measure.
Why turnout in Harsens Island looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Harsens Island 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%. Homeowners vote more often than renters, and about 97% of households in Harsens Island own their home, about 22 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Harsens Island have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Roberts Landing, MI R+39
- Algonac, MI R+33
- Pearl Beach, MI R+30
- Riverside, MI R+37
- Fair Haven, MI R+36
- Peters, MI R+47
- Marine City, MI R+32
- Sebille Manor, MI R+24
- New Baltimore, MI R+25
- Casco, MI R+45
Cities with Similar Populations
- Zephyr, TX R+81
- Genoa, VA R+64
- Lake George, CO R+19
- Free Union, VA D+13
- Manchester, LA R+71
- North Topsail Beach, NC R+40
- Success, MS R+71
- Hospah, NM D+42
- Midland, OH R+66
- Versailles, NY D+32
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.