Mount Hamill leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 96% of adults in Mount Hamill typically vote, above the U.S. average of about 62%. Among adults in Mount Hamill, ~26% vote Democratic, ~70% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.
How Mount Hamill compares
Among cities within 25 miles, Mount Hamill leans more Republican than 22 of 57 neighbors.
Mount Hamill runs about 33 points more Republican than Iowa as a whole.
Why Mount Hamill 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 Mount Hamill, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 86% of residents in Mount Hamill drive to work alone, about 12 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 77% of households in Mount Hamill are family households, above 82% of cities.
Population density and Republican lean
Places with low population density tend to lean Republican; Mount Hamill, IA sits in the bottom quarter nationally on this measure.
Why turnout in Mount Hamill looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Mount Hamill 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 70%, about 10 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 94% of households in Mount Hamill own their home, about 19 points above the U.S. average of 75%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Houghton, IA R+47
- Primrose, IA R+47
- St. Paul, IA R+46
- Franklin, IA R+45
- Donnellson, IA R+41
- Hillsboro, IA R+51
- Farmington, IA R+53
- Salem, IA R+49
- West Point, IA R+41
- Bonaparte, IA R+55
Cities with Similar Populations
- Zenith, KS R+74
- Union Falls, NY R+12
- Lotus, IN R+64
- Cloverdale, TN R+74
- Triplet, VA D+9
- Roy Lake, MN R+12
- Toponas, CO Even
Sources and methodology
Precinct-level voting records used to fit the model come from Iowa 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.