Casco leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 91% of adults in Casco typically vote, above the U.S. average of about 62%. Among adults in Casco, ~26% vote Democratic, ~65% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Casco compares
Among cities within 25 miles, Casco leans more Republican than 40 of 56 neighbors.
Casco runs about 44 points more Republican than Michigan as a whole.
Politics vary noticeably by neighborhood within Casco. The east side is the most Republican-leaning (R+49) and the southwest side is the least Republican-leaning (R+37), a spread of about 12 points.
Why Casco 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 Casco, not a ranked or complete list of what matters most.
Casco votes Republican even though it is densely developed (about 23%, modestly below the Michigan average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 75% of households in Casco are family households, above 77% of cities.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Casco, MI sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Casco looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Casco 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 71%, about 10 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in Casco own their home, about 20 points above the U.S. average of 75%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Muttonville, MI R+48
- Anchorville, MI R+47
- Fair Haven, MI R+36
- New Haven, MI R+26
- Richmond, MI R+38
- Columbus, MI R+48
- Mount Vernon, MI R+50
- Peters, MI R+47
- East China, MI R+40
- Rattle Run, MI R+51
Cities with Similar Populations
- Cathlamet, WA R+15
- Upland, PA D+35
- Westport, WA Even
- Keystone, CA D+24
- Hahnville, LA D+6
- Steele, AL R+80
- Laporte, MN R+33
- Alpine, NJ Even
- Sherrill, NY R+4
- Swift Trail Junction, AZ R+55
All Local Stats
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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.