Gretna leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 53% of adults in Gretna typically vote, below the U.S. average of about 62%. Among adults in Gretna, ~32% vote Democratic, ~21% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How Gretna compares
Among cities within 25 miles, Gretna leans more Democratic than 35 of 49 neighbors.
Gretna runs about 42 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while Gretna is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Gretna. The northeast side is the most Democratic-leaning (D+72) and the southeast side is the least Democratic-leaning (D+7), a spread of about 65 points.
Why Gretna 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 Gretna, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in Gretna live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in Gretna have never been married, above 93% of cities. Gretna 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; Gretna, LA sits in the top tenth nationally on this measure.
Why turnout in Gretna looks the way it does
Renters vote less often than owners. About 47% of households in Gretna rent, about 22 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and Gretna sits in the bottom quarter on routine-care measures. High food insecurity lines up with lower turnout, and about 27% of adults in Gretna report food insecurity, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Terrytown, LA D+27
- Harvey, LA D+32
- Timberlane, LA D+16
- Woodmere, LA D+75
- Marrero, LA D+20
- Estelle, LA Even
- Arabi, LA R+18
- New Orleans, LA D+25
- Belle Chasse, LA R+42
- St. Rosalie, LA R+44
Cities with Similar Populations
- Canfield, OH R+22
- Seaford, DE R+10
- Candler-McAfee, GA D+84
- Acton, MA D+43
- Fountain Inn, SC R+30
- Oroville, CA R+21
- East Renton Highlands, WA D+23
- Union Hill-Novelty Hill, WA D+33
- Central Falls, RI D+23
- Summit, NJ D+29
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.