Grattan leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 91% of adults in Grattan typically vote, above the U.S. average of about 62%. Among adults in Grattan, ~32% vote Democratic, ~59% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Grattan compares
Among cities within 25 miles, Grattan leans more Republican than 26 of 66 neighbors.
Grattan runs about 28 points more Republican than Michigan as a whole.
Why Grattan 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 Grattan, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 88% of residents in Grattan drive to work alone, about 15 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 83% of households in Grattan are family households, above 94% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Grattan, MI sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Grattan looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Grattan 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Grattan have completed high school, above 88% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Parnell, MI R+25
- Cooks Corners, MI R+41
- Cannonsburg, MI R+17
- Belding, MI R+28
- Evans, MI R+36
- Greenville, MI R+27
- Rockford, MI R+16
- Ada, MI R+12
- Gowen, MI R+40
- Lowell, MI R+20
Cities with Similar Populations
- Haydenville, MA D+49
- Lovelady, TX R+58
- Mount Ida, AR R+61
- Miles, TX R+79
- Ney, OH R+62
- Tula, MS R+4
- Hurlburt Field, FL R+44
- Eagleville, PA D+43
- Ferndale, PA R+26
- Raymond, OH R+50
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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.