Marquette County is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 82% of adults in Marquette County typically vote, above the U.S. average of about 62%. Among adults in Marquette County, ~41% vote Democratic, ~41% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Marquette County compares
Among counties within 50 miles, Marquette County sits roughly in the middle of the political spectrum, with 0 neighbors leaning further in the place's direction and 2 leaning the other way.
Politically, Marquette County sits close to the rest of Michigan.
Politics vary noticeably by city within Marquette County. The northeast side runs the most Democratic (D+25) and the south side runs the most Republican (R+28), a spread of about 53 points.
Why Marquette County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Marquette County. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Marquette County, MI does.
Why turnout in Marquette County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Marquette 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 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Marquette County have completed high school, above 95% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Alger County, MI R+17
- Baraga County, MI R+14
- Delta County, MI R+22
- Dickinson County, MI R+25
- Iron County, MI R+24
- Florence County, WI R+41
- Houghton County, MI D+5
- Schoolcraft County, MI R+28
- Keweenaw County, MI Even
- Menominee County, MI R+30
Counties with Similar Populations
- Apache County, AZ D+30
- Wilkes County, NC R+57
- Harrison County, WV R+41
- Starr County, TX R+7
- Crow Wing County, MN R+29
- Tehama County, CA R+35
- Sauk County, WI R+20
- Chippewa County, WI R+24
- Adams County, IL R+40
- Warren County, NY R+2
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.