Iosco County leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 87% of adults in Iosco County typically vote, above the U.S. average of about 62%. Among adults in Iosco County, ~31% vote Democratic, ~56% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How Iosco County compares
Among counties within 50 miles, Iosco County leans more Republican than 1 of 6 neighbors.
Iosco County runs about 26 points more Republican than Michigan as a whole.
Politics vary noticeably by city within Iosco County. The southwest side is the most Republican-leaning (R+45) and the southeast side is the least Republican-leaning (R+19), a spread of about 26 points.
Why Iosco County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Iosco County. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Iosco County, 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 Iosco County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Iosco 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 64%, above 75% of counties. Homeowners vote more often than renters, and about 82% of households in Iosco County own their home, above 89% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Alcona County, MI R+36
- Arenac County, MI R+40
- Ogemaw County, MI R+40
- Oscoda County, MI R+44
- Huron County, MI R+42
- Alpena County, MI R+25
- Gladwin County, MI R+42
- Montmorency County, MI R+42
- Bay County, MI R+18
- Roscommon County, MI R+26
Counties with Similar Populations
- Barbour County, AL R+3
- Posey County, IN R+45
- Macon County, TN R+68
- Todd County, MN R+50
- Lyon County, MN R+28
- Adair County, MO R+21
- Washington County, FL R+61
- Fannin County, GA R+62
- Hardee County, FL R+46
- Lauderdale County, TN R+23
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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.