Iron Mountain is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 63% of adults in Iron Mountain typically vote, near the U.S. average of about 62%. Among adults in Iron Mountain, ~10% vote Democratic, ~53% Republican, and ~37% 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 58 of 66 neighbors.
Iron Mountain runs about 50 points more Republican than Missouri as a whole.
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.
Rural areas vote Republican. About 4% of residents in Iron Mountain live in densely developed areas, about 18 points below the Missouri average of 22%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Iron Mountain, MO sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Iron Mountain looks the way it does
Turnout in Iron Mountain sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Iron Mountain Lake, MO R+71
- Bismarck, MO R+64
- Pilot Knob, MO R+57
- Snow Hollow Lake, MO R+62
- Roselle, MO R+63
- Middle Brook, MO R+64
- Belleview, MO R+67
- Ironton, MO R+56
- Caledonia, MO R+67
- Irondale, MO R+66
Cities with Similar Populations
- Warren, ND R+47
- Mack Creek Village, VA R+58
- Dedham, ME R+14
- Donaldson, WV R+72
- Puerto De Luna, NM R+5
- Deep River, IN R+31
- Sandy Valley, PA R+62
- Schochoh, KY R+64
- Reeds, ME R+36
- Mayville, MN R+38
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri Secretary 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.