Marne leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 73% of adults in Marne typically vote, above the U.S. average of about 62%. Among adults in Marne, ~20% vote Democratic, ~53% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Marne compares
Among cities within 25 miles, Marne leans more Republican than 11 of 39 neighbors.
Marne runs about 34 points more Republican than Iowa as a whole.
Why Marne 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 Marne, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 76% of households in Marne are family households, about 10 points above the U.S. average of 67%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Marne, IA sits above the national average 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 Marne looks the way it does
Turnout in Marne 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
- Atlantic, IA R+34
- Walnut, IA R+43
- Lorah, IA R+48
- Lewis, IA R+49
- Elk Horn, IA R+47
- Brayton, IA R+51
- Avoca, IA R+41
- Wiota, IA R+49
- Kimballton, IA R+55
- Hancock, IA R+47
Cities with Similar Populations
- Twentythree, AR R+68
- Park Center, CO R+36
- Essig, MN R+60
- Camden-on-Gauley, WV R+65
- Rector, PA R+45
- Walnut Grove, OH R+66
- Natoma, KS R+79
- Knowlesville, NY R+44
- Rochester, TX R+79
- Torrey, UT R+59
All Local Stats
Home Services
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.