Grass Lake leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 94% of adults in Grass Lake typically vote, above the U.S. average of about 62%. Among adults in Grass Lake, ~35% vote Democratic, ~59% Republican, and ~6% don't vote. The map below shows estimated turnout by block group.
How Grass Lake compares
Among cities within 25 miles, Grass Lake leans more Republican than 27 of 67 neighbors.
Grass Lake runs about 25 points more Republican than Michigan as a whole.
Politics vary noticeably by neighborhood within Grass Lake. The northwest side is the most Republican-leaning (R+33) and the northeast side is the least Republican-leaning (R+11), a spread of about 22 points.
Why Grass Lake leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Grass Lake. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Grass Lake, MI does.
Why turnout in Grass Lake looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Grass Lake 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 75%, about 15 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Grass Lake own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Grass Lake have completed high school, above 80% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Leoni, MI R+32
- Trist, MI R+30
- Norvell, MI R+29
- Napoleon, MI R+32
- Waterloo, MI R+16
- Michigan Center, MI R+24
- Munith, MI R+33
- Chelsea, MI D+17
- Manchester, MI R+10
- Sharon Hollow, MI R+13
Cities with Similar Populations
- Milford, NJ R+23
- Trenton, TN R+43
- Rockport, MA D+39
- Cicero, IN R+37
- Parker, TX R+17
- Coupeville, WA D+19
- Lake City, MN R+19
- Houghton Lake, MI R+29
- Whitemarsh Island, GA R+18
- Winfield, IN R+23
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.