70543 is a Republican stronghold. About 7% of voters here vote Democratic and 93% Republican.
About 71% of adults in 70543 typically vote, above the U.S. average of about 62%. Among adults in 70543, ~5% vote Democratic, ~66% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 70543 compares
Among zip codes within 15 miles, 70543 leans more Republican than 10 of 11 neighbors.
70543 runs about 64 points more Republican than Louisiana as a whole.
Why 70543 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 70543, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 70543, about 96% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 12% of adults hold a bachelor's degree, about 7 points below the Louisiana average of 19%. A high family-household share predicts Republican voting, and about 75% of households in 70543 are family households, above 79% of zip codes.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 70543, LA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 70543 looks the way it does
Turnout in 70543 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.