Marthasville is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 77% of adults in Marthasville typically vote, above the U.S. average of about 62%. Among adults in Marthasville, ~18% vote Democratic, ~59% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Marthasville compares
Among cities within 25 miles, Marthasville leans more Republican than 43 of 76 neighbors.
Marthasville runs about 36 points more Republican than Missouri as a whole.
Why Marthasville 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 Marthasville, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 76% of households in Marthasville are family households, about 9 points above the U.S. average of 67%.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; Marthasville, MO sits in the bottom quarter nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in Marthasville looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Marthasville have completed high school, about 8 points above the Missouri average of 89%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Femme Osage, MO R+59
- Dutzow, MO R+56
- Peers, MO R+58
- Hopewell, MO R+56
- Dundee, MO R+63
- Holstein, MO R+58
- Innsbrook, MO R+42
- Washington, MO R+40
- Augusta, MO R+45
Cities with Similar Populations
- St. Bernard, OH D+7
- Madison, ME R+24
- Vanceburg, KY R+65
- Mooringsport, LA R+65
- Montauk, NY D+7
- Canon, GA R+64
- Fort Shawnee, OH R+46
- Cass City, MI R+38
- Tuscola, TX R+76
- Shavano Park, TX R+8
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.