How many people live in St. John the Baptist Parish, LA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 39,700 people living in St. John the Baptist Parish, LA. That makes St. John the Baptist Parish the 27th-most populous parish in Louisiana. It is home to 0.86% of people living in the state.
39.7K
population of St. John the Baptist Parish, LA (2024)
0.86%
County share of the Louisiana population (2024)
About 39,700 people lived in St. John the Baptist Parish, LA in 2024.
Population estimates, 2000–2024
What are St. John the Baptist Parish, LA’s age demographics?
About 6,700 St. John the Baptist Parish, LA residents are aged 65 and older in 2024. That represents 16.8% of its population. For comparison, the age group represents 17.8% of Louisiana’s population and 18% in the US overall.
Another 9,400 St. John the Baptist Parish residents, or 23.6% of the population, were children under 18. For comparison, the age group represents 23.3% of Louisiana’s population and 21.6% in the US overall.
A higher share of St. John the Baptist Parish, LA's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are St. John the Baptist Parish, LA’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 58.2% of the St. John the Baptist Parish, LA population, higher than the national share of 12.6%.
In contrast, St. John the Baptist Parish’s non-Hispanic white population accounts for 28.8%, below the 57.5% nationwide, and the Hispanic population makes up 10.3% of the parish, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. John the Baptist Parish, LA has a higher share of a non-Hispanic Black or African American population than Louisiana as a whole.
Population estimates by race and ethnicity, (2024)
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
