70390 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 67% of adults in 70390 typically vote, near the U.S. average of about 62%. Among adults in 70390, ~31% vote Democratic, ~36% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How 70390 compares
Among zip codes within 15 miles, 70390 leans more Republican than 5 of 8 neighbors.
70390 runs about 15 points more Democratic than Louisiana as a whole.
Politics vary noticeably by block within 70390. The south side runs the most Democratic (D+19) and the east side runs the most Republican (R+74), a spread of about 92 points.
Why 70390 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 70390, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 89% of residents in 70390 drive to work alone, about 15 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and 70390 sits in the bottom quarter (about 14%, below 85% of zip codes).
Park access and Republican lean
Places with low park coverage tend to lean Republican; 70390, LA sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 70390 looks the way it does
Turnout in 70390 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 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.