St. John the Baptist Parish leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 72% of adults in St. John the Baptist Parish typically vote, above the U.S. average of about 62%. Among adults in St. John the Baptist Parish, ~45% vote Democratic, ~27% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How St. John the Baptist Parish compares
Among counties within 50 miles, St. John the Baptist Parish leans more Democratic than 14 of 15 neighbors.
St. John the Baptist Parish runs about 49 points more Democratic than Louisiana as a whole. Louisiana leans Republican overall, while St. John the Baptist Parish is one of the few Democratic-leaning pockets.
Politics vary noticeably by city within St. John the Baptist Parish. The northeast side runs the most Democratic (D+44) and the west side runs the most Republican (R+18), a spread of about 62 points.
Why St. John the Baptist Parish leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for St. John the Baptist Parish, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in St. John the Baptist Parish is about 29%, about 43 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 36% of adults in St. John the Baptist Parish have never been married, above 87% of counties. St. John the Baptist Parish runs against the grain of Louisiana, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; St. John the Baptist Parish, LA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in St. John the Baptist Parish looks the way it does
Turnout in St. John the Baptist Parish 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 Counties
- St. Charles Parish, LA R+25
- St. James Parish, LA D+3
- Jefferson Parish, LA D+4
- Lafourche Parish, LA R+55
- Orleans Parish, LA D+63
- Ascension Parish, LA R+32
- Tangipahoa Parish, LA R+31
- Livingston Parish, LA R+66
- Assumption Parish, LA R+30
- Terrebonne Parish, LA R+42
Counties with Similar Populations
- Mercer County, OH R+65
- Ohio County, WV R+20
- Erath County, TX R+55
- Vance County, NC D+19
- Danville City, VA D+32
- Summit County, UT D+10
- Miller County, AR R+26
- Montrose County, CO R+30
- Union County, PA R+26
- Sweetwater County, WY R+53
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.