Port Sulphur leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 75% of adults in Port Sulphur typically vote, above the U.S. average of about 62%. Among adults in Port Sulphur, ~40% vote Democratic, ~35% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Port Sulphur compares
Among cities within 25 miles, Port Sulphur leans more Democratic than 13 of 19 neighbors.
Port Sulphur runs about 28 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while Port Sulphur is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Port Sulphur. The north side runs the most Democratic (D+30) and the northwest side runs the most Republican (R+24), a spread of about 54 points.
Why Port Sulphur 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 Port Sulphur, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Port Sulphur is about 38%, about 34 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 33% of adults in Port Sulphur have never been married, above 82% of cities. Port Sulphur runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Port Sulphur, LA sits in the top quarter nationally on this measure.
Why turnout in Port Sulphur looks the way it does
Turnout in Port Sulphur 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
- Pointe a la Hache, LA D+71
- Davant, LA D+54
- Harlem, LA D+32
- Empire, LA R+21
- Braithwaite, LA D+28
- Buras, LA R+30
Cities with Similar Populations
- Fowler, MI R+48
- Hager City, WI R+34
- Lauderdale, MS R+42
- Tucker, TX R+66
- Port Royal, PA R+59
- Farmersville, OH R+65
- Gates, NC R+18
- Douglass, KS R+53
- Reedsville, WV R+56
- Cherry Valley, MA R+6
All Local Stats
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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.