St. Martin Parish leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 80% of adults in St. Martin Parish typically vote, above the U.S. average of about 62%. Among adults in St. Martin Parish, ~26% vote Democratic, ~54% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How St. Martin Parish compares
Among counties within 50 miles, St. Martin Parish leans more Republican than 8 of 11 neighbors.
St. Martin Parish runs about 13 points more Republican than Louisiana as a whole.
Politics vary noticeably by city within St. Martin Parish. The south side runs the most Democratic (D+11) and the east side runs the most Republican (R+77), a spread of about 87 points.
Why St. Martin Parish leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for St. Martin Parish, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 84% of residents in St. Martin Parish drive to work alone, about 10 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and St. Martin Parish sits in the bottom quarter (about 17%, below 76% of counties).
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; St. Martin Parish, LA sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in St. Martin Parish looks the way it does
Turnout in St. Martin Parish 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 Counties
- Lafayette Parish, LA R+23
- Iberia Parish, LA R+24
- Vermilion Parish, LA R+55
- St. Landry Parish, LA R+11
- Acadia Parish, LA R+54
- Iberville Parish, LA R+6
- Pointe Coupee Parish, LA R+25
- West Baton Rouge Parish, LA R+9
- Evangeline Parish, LA R+39
- St. Mary Parish, LA R+23
Counties with Similar Populations
- Oktibbeha County, MS D+3
- Ogle County, IL R+28
- Waupaca County, WI R+34
- Harrisonburg City, VA D+18
- Darke County, OH R+61
- Grant County, WI R+23
- Nye County, NV R+41
- Cass County, MI R+29
- Franklin County, KY R+19
- Hoke County, NC D+7
Sources and methodology
Precinct-level voting records used to fit the model come from Louisiana 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.