Harvey leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 57% of adults in Harvey typically vote, near the U.S. average of about 62%. Among adults in Harvey, ~38% vote Democratic, ~19% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How Harvey compares
Among cities within 25 miles, Harvey leans more Democratic than 48 of 52 neighbors.
Harvey runs about 54 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while Harvey is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Harvey. The northeast side runs the most Democratic (D+61) and the northwest side runs the most Republican (R+23), a spread of about 84 points.
Why Harvey 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 Harvey, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 91% of residents in Harvey live in densely developed areas, about 55 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 38% of adults in Harvey have never been married, above 92% of cities. Harvey runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Harvey, LA sits in the top tenth nationally on this measure.
Why turnout in Harvey looks the way it does
Renters vote less often than owners. About 37% of households in Harvey rent, about 12 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and Harvey sits in the bottom quarter on routine-care measures. High food insecurity lines up with lower turnout, and about 30% of adults in Harvey report food insecurity, above 95% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Gretna, LA D+20
- Timberlane, LA D+16
- Woodmere, LA D+75
- Terrytown, LA D+27
- Marrero, LA D+20
- Estelle, LA Even
- St. Rosalie, LA R+44
- Belle Chasse, LA R+42
- Westwego, LA R+11
Cities with Similar Populations
- Pewaukee, WI R+13
- McMinnville, TN R+60
- Twentynine Palms, CA R+24
- East Palo Alto, CA D+49
- Davison, MI R+14
- Martinez, GA R+27
- Riverside, NJ D+7
- Lake Jackson, TX R+36
- Piedmont, SC R+33
- Dinuba, CA Even
All Local Stats
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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.