Thornville leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 91% of adults in Thornville typically vote, above the U.S. average of about 62%. Among adults in Thornville, ~28% vote Democratic, ~63% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Thornville compares
Among cities within 25 miles, Thornville leans more Republican than 38 of 63 neighbors.
Thornville runs about 36 points more Republican than Michigan as a whole.
Politics vary noticeably by neighborhood within Thornville. The southeast side is the most Republican-leaning (R+45) and the southwest side is the least Republican-leaning (R+29), a spread of about 16 points.
Why Thornville 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 Thornville, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 76% of households in Thornville are family households, about 9 points above the U.S. average of 67%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Thornville, MI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Thornville looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Thornville 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 93% of households in Thornville own their home, about 18 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Thornville have completed high school, above 88% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Dryden, MI R+43
- Metamora, MI R+34
- Attica, MI R+44
- Hunters Creek, MI R+36
- Leonard, MI R+36
- Oxford, MI R+21
- Kerr Hill, MI R+38
- Almont, MI R+39
- Lakeville, MI R+33
- Lapeer, MI R+30
Cities with Similar Populations
- Jeff Davis, MS R+37
- Cottonwood Falls, KS R+40
- Big Sandy, MT R+23
- Newaukum, WA R+26
- Walkerton, VA R+36
- Sibley, MO R+55
- Annawan, IL R+37
- Thornton, TX R+78
- Todds Tavern, VA R+31
- Lester, AL R+80
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.