70643 is a Republican stronghold. About 6% of voters here vote Democratic and 94% Republican.
About 82% of adults in 70643 typically vote, above the U.S. average of about 62%. Among adults in 70643, ~5% vote Democratic, ~77% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 70643 compares
70643 runs about 66 points more Republican than Louisiana as a whole.
Why 70643 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 70643, not a ranked or complete list of what matters most.
Rural areas vote Republican. Fewer than 1% of residents in 70643 live in densely developed areas, about 24 points below the Louisiana average of 25%. A high white share with below-average college attainment predicts Republican voting, and 70643 fits that profile on both counts. A high family-household share predicts Republican voting, and about 90% of households in 70643 are family households, in the top fraction of zip codes.
Population density and Republican lean
Places with low population density tend to lean Republican; 70643, LA sits in the bottom tenth nationally on this measure.
Why turnout in 70643 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 70643 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 62%, about 7 points above the Louisiana average of 55%. 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.