Iron Mountain leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 90% of adults in Iron Mountain typically vote, above the U.S. average of about 62%. Among adults in Iron Mountain, ~36% vote Democratic, ~54% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Iron Mountain compares
Among cities within 25 miles, Iron Mountain leans more Republican than 2 of 34 neighbors.
Iron Mountain runs about 18 points more Republican than Michigan as a whole.
Politics vary noticeably by neighborhood within Iron Mountain. The northeast side is the most Republican-leaning (R+33) and the south side is the least Republican-leaning (R+13), a spread of about 20 points.
Why Iron Mountain 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 Iron Mountain, not a ranked or complete list of what matters most.
Iron Mountain votes Republican even though it is densely developed (about 59%, well above the Michigan average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Iron Mountain, MI sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Iron Mountain looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Iron Mountain 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%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Kingsford, MI R+19
- Quinnesec, MI R+32
- Merriman, MI R+37
- Spread Eagle, WI R+19
- Niagara, WI R+45
- Granite Bluff, MI R+35
- Norway, MI R+31
- Florence, WI R+38
- Loretto, MI R+36
- Randville, MI R+36
Cities with Similar Populations
- South Beloit, IL R+14
- Gladwin, MI R+40
- Venetia, PA R+19
- Columbiana, OH R+37
- Haleyville, AL R+78
- Lincoln Village, OH R+5
- Richboro, PA R+11
- Pendleton, SC R+36
- Bala-Cynwyd, PA D+44
- Bushnell, FL R+44
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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.