Delta County leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 87% of adults in Delta County typically vote, above the U.S. average of about 62%. Among adults in Delta County, ~34% vote Democratic, ~53% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How Delta County compares
Among counties within 50 miles, Delta County leans more Republican than 1 of 4 neighbors.
Delta County runs about 20 points more Republican than Michigan as a whole.
Politics vary noticeably by city within Delta County. The northwest side is the most Republican-leaning (R+40) and the south side is the least Republican-leaning (R+3), a spread of about 37 points.
Why Delta County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Delta County, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 82% of residents in Delta County drive to work alone, about 8 points above the U.S. average of 74%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Delta County, MI sits in the top quarter 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 Delta County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Delta County 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 67%, about 7 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 83% of households in Delta County own their home, above 92% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Menominee County, MI R+30
- Schoolcraft County, MI R+28
- Alger County, MI R+17
- Dickinson County, MI R+25
- Marquette County, MI Even
- Marinette County, WI R+34
- Florence County, WI R+41
- Door County, WI R+3
- Iron County, MI R+24
- Luce County, MI R+32
Counties with Similar Populations
- Clinton County, IL R+47
- Dare County, NC R+25
- Webster Parish, LA R+27
- Clark County, KY R+39
- Webster County, IA R+22
- Dyer County, TN R+47
- Macon County, NC R+42
- Hopkins County, TX R+61
- Chippewa County, MI R+11
- McLeod County, MN R+40
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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.