Plaquemines Parish leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 74% of adults in Plaquemines Parish typically vote, above the U.S. average of about 62%. Among adults in Plaquemines Parish, ~27% vote Democratic, ~47% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Plaquemines Parish compares
Among counties within 50 miles, Plaquemines Parish leans more Republican than 5 of 7 neighbors.
Plaquemines Parish runs about 5 points more Republican than Louisiana as a whole.
Politics vary noticeably by city within Plaquemines Parish. The south side runs the most Democratic (D+14) and the northwest side runs the most Republican (R+41), a spread of about 55 points.
Why Plaquemines 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 Plaquemines Parish, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 74% of households in Plaquemines Parish are family households, about 7 points above the U.S. average of 67%.
Non-English at home and voter turnout
Places with a low non-English-at-home share tend to turn out at a higher rate; Plaquemines Parish, LA sits below the national average on this measure.
Why turnout in Plaquemines Parish looks the way it does
Turnout in Plaquemines 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
- St. Bernard Parish, LA R+14
- Orleans Parish, LA D+63
- Jefferson Parish, LA D+4
- St. Charles Parish, LA R+25
- St. John the Baptist Parish, LA D+27
- Lafourche Parish, LA R+55
- St. Tammany Parish, LA R+35
- Terrebonne Parish, LA R+42
- St. James Parish, LA D+3
- Hancock County, MS R+53
Counties with Similar Populations
- Washington County, MO R+63
- Juniata County, PA R+62
- Grainger County, TN R+71
- Menominee County, MI R+30
- Winston County, AL R+82
- Seminole County, OK R+51
- Mingo County, WV R+71
- Roscommon County, MI R+26
- Curry County, OR R+11
- Antrim County, MI R+21
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.