70815 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 59% of adults in 70815 typically vote, near the U.S. average of about 62%. Among adults in 70815, ~40% vote Democratic, ~19% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 70815 compares
Among zip codes within 15 miles, 70815 leans more Democratic than 21 of 32 neighbors.
70815 runs about 56 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while 70815 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 70815. The northeast side is the most Democratic-leaning (D+63) and the southwest side is the least Democratic-leaning (Even), a spread of about 62 points.
Why 70815 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 70815, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 70815 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in 70815 have never been married, above 87% of zip codes. 70815 runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Developed land and Democratic lean
Places with a heavily developed built environment tend to lean Democratic; 70815, LA sits in the top tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 70815 looks the way it does
Areas with high food insecurity turn out at lower rates. About 29% of adults in 70815 report food insecurity, about 13 points above the U.S. average of 16%. Renters vote less often than owners, and about 37% of households in 70815 rent, above 84% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.