Hahnville leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 66% of adults in Hahnville typically vote, near the U.S. average of about 62%. Among adults in Hahnville, ~35% vote Democratic, ~31% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Hahnville compares
Among cities within 25 miles, Hahnville leans more Democratic than 39 of 60 neighbors.
Hahnville runs about 28 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while Hahnville is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Hahnville. The north side runs the most Democratic (D+15) and the southwest side runs the most Republican (R+31), a spread of about 46 points.
Why Hahnville 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 Hahnville, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Hahnville is about 57%, about 16 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 33% of adults in Hahnville have never been married, above 82% of cities. Hahnville runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Hahnville, LA sits in the top tenth nationally on this measure.
Why turnout in Hahnville looks the way it does
Homeowners vote more often than renters. About 98% of households in Hahnville own their home, about 21 points above the Louisiana average of 76%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- New Sarpy, LA R+17
- Destrehan, LA R+34
- Norco, LA R+49
- Boutte, LA D+22
- Killona, LA D+84
- Luling, LA R+39
- St. Rose, LA D+21
- Paradis, LA R+65
- Ama, LA R+9
- Laplace, LA D+25
Cities with Similar Populations
- Casco, MI R+45
- Cathlamet, WA R+15
- Upland, PA D+35
- Keystone, CA D+24
- Westport, WA Even
- Steele, AL R+80
- Alpine, NJ Even
- Laporte, MN R+33
- Swift Trail Junction, AZ R+55
- Beresford, SD R+49
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.