St. John the Baptist Parish is a county of 40,743 people in Louisiana. 18% of adults hold a bachelor's degree, below the 36% national rate. 77% of homes are owner-occupied. Home values have more than doubled since 2000, reaching $193,200. The foreign-born share is 5%. Households take in $66,630 at the median, 19% less than the US figure.
At a glance
Lower income
median household income $66,630, below the US median
US median: $82,259
Mid-age
median age 40.1
US median: 38.9
Less educated
18% hold a bachelor's degree
US average: 36%
Less affordable
home values up 34%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about St. John the Baptist Parish
What changed most since 1990
Black share35.8% → 56.8%(+21.0 pts)US over the same years: +0.2 pts
White share60.8% → 29.5%(−31.2 pts)US over the same years: −17.8 pts
Median age28.9 → 40.1(+11.2 years)US over the same years: +6.0 years
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)27.8%(570)
US avg: 26.4%
Gulf War (1990s)28.9%(593)
US avg: 24.3%
Vietnam era23.6%(484)
US avg: 33.1%
Korean War3.5%(72)
US avg: 4.5%
World War II3%(61)
US avg: 1%
Share of the 2,054 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
St. John the Baptist Parish, decade by decade
St. John the Baptist Parish population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
39,996
$69,686
$148,564
11.4%
62.7
2000
43,044
$71,875
$143,911
12.9%
67.5
2010
45,924
$68,571
$211,038
15.8%
69.4
2020
42,477
$67,182
$188,957
17.2%
71.7
2024
40,743
$66,630
$193,200
18.2%
72.5
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
How many people live in St. John the Baptist Parish, Louisiana?
St. John the Baptist Parish, Louisiana has about 40,743 residents according to the 2024 American Community Survey.
What is the median household income in St. John the Baptist Parish, Louisiana?
The typical household in St. John the Baptist Parish, Louisiana earns about $66,630 a year. Half of households make more than that, and half make less.
Is St. John the Baptist Parish, Louisiana expensive?
In St. John the Baptist Parish, Louisiana, the median home is worth about $193,200, and the typical rent is about $1,334 a month.
How educated are people in St. John the Baptist Parish, Louisiana?
About 18.2% of adults age 25 and over in St. John the Baptist Parish, Louisiana hold a bachelor's degree or higher.
What is the poverty rate in St. John the Baptist Parish, Louisiana?
About 14.4% of people in St. John the Baptist Parish, Louisiana live below the federal poverty line.
Has St. John the Baptist Parish, Louisiana grown since 1990?
Yes, St. John the Baptist Parish, Louisiana has grown since 1990. The population has added about 747 residents, a change of about 2 percent over that period.
