St. Martins leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 77% of adults in St. Martins typically vote, above the U.S. average of about 62%. Among adults in St. Martins, ~20% vote Democratic, ~57% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How St. Martins compares
Among cities within 25 miles, St. Martins leans more Republican than 12 of 56 neighbors.
St. Martins runs about 30 points more Republican than Missouri as a whole.
Politics vary noticeably by neighborhood within St. Martins. The northeast side is the most Republican-leaning (R+51) and the southeast side is the least Republican-leaning (R+37), a spread of about 14 points.
Why St. Martins 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 St. Martins, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 89% of residents in St. Martins drive to work alone, about 15 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 76% of households in St. Martins are family households, above 78% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; St. Martins, MO 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 St. Martins looks the way it does
Turnout in St. Martins sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Lohman, MO R+47
- Centertown, MO R+58
- Marion, MO R+57
- Jefferson City, MO R+23
- Hartsburg, MO R+26
- Cedar City, MO R+43
- Russellville, MO R+67
- Scrivner, MO R+66
- Oldham, MO R+27
- Sandy Hook, MO R+64
Cities with Similar Populations
- East Millinocket, ME R+20
- Cumming, IA R+28
- Boyd, WI R+40
- Slaughters, KY R+62
- Greenwood, MI R+48
- Randle, WA R+30
- Rich Square, NC D+32
- Eagletown, OK R+72
- Craig South Highlands, CO R+65
- Valmeyer, IL R+56
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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.