Carbon is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 82% of adults in Carbon typically vote, above the U.S. average of about 62%. Among adults in Carbon, ~19% vote Democratic, ~63% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Carbon compares
Among cities within 25 miles, Carbon leans more Republican than 26 of 35 neighbors.
Carbon runs about 40 points more Republican than Iowa as a whole.
Why Carbon 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 Carbon, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Carbon sits in the bottom quarter on density and about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Carbon, IA sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Carbon looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Carbon 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 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Carbon have completed high school, above 86% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Corning, IA R+41
- Mount Etna, IA R+54
- Nodaway, IA R+48
- Carl, IA R+53
- Villisca, IA R+46
- Grant, IA R+49
- Prescott, IA R+54
- Lyman, IA R+50
- Massena, IA R+59
- Stringtown, IA R+55
Cities with Similar Populations
- Windsor Mercer County, IL R+31
- Christy, KY R+42
- North Guilford, ME R+39
- Thompson, AL D+38
- Foxley Manor, MD D+17
- McKinley, AL D+31
- Newport, TX R+81
- Newport, NE R+79
- Somerset, IL R+61
- Soperton, WI R+36
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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.