Marrero leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 58% of adults in Marrero typically vote, near the U.S. average of about 62%. Among adults in Marrero, ~35% vote Democratic, ~23% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How Marrero compares
Among cities within 25 miles, Marrero leans more Democratic than 36 of 50 neighbors.
Marrero runs about 42 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while Marrero is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Marrero. The west side runs the most Democratic (D+72) and the southeast side runs the most Republican (R+38), a spread of about 109 points.
Why Marrero 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 Marrero, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in Marrero live in densely developed areas, about 50 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 35% of adults in Marrero have never been married, above 87% of cities. Marrero runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Marrero, LA sits in the top 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 Marrero looks the way it does
Areas with high food insecurity turn out at lower rates. About 28% of adults in Marrero report food insecurity, about 12 points above the U.S. average of 16%. Limited routine healthcare access lines up with lower turnout, and Marrero sits in the bottom quarter on routine-care measures. Low high-school completion lines up with lower turnout, and about 80% of adults in Marrero have completed high school, below 91% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Estelle, LA Even
- Woodmere, LA D+75
- Westwego, LA R+11
- Harvey, LA D+32
- Gretna, LA D+20
- Bridge City, LA D+22
- Timberlane, LA D+16
- Terrytown, LA D+27
- St. Rosalie, LA R+44
- Avondale, LA D+8
Cities with Similar Populations
- Clementon, NJ D+35
- Moorpark, CA D+8
- Indian Trail, NC R+15
- Marion, IN R+24
- Hopkinsville, KY R+13
- Lauderdale Lakes, FL D+71
- Grass Valley, CA D+5
- Fenton, MO R+18
- Michigan City, IN D+12
- Mount Laurel, NJ D+22
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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.