Slidell is home to 28,561 people in Louisiana. 4% of people here were born outside the United States. The typical home is worth $217,700, having more than doubled since 2000. There are 1,870 people per square mile. Households here earn about 16% more than in Louisiana as a whole. About 31% of adults have finished a four-year degree.
At a glance
Lower income
median household income $70,497, below the US median
US median: $82,259
Mid-age
median age 38.9
US median: 38.9
Average education
31% hold a bachelor's degree
US average: 36%
Less affordable
home values up 32%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Slidell
What changed most since 1990
Black share10.5% → 19.6%(+9.1 pts)US over the same years: +0.2 pts
Adults with a bachelor's degree23.7% → 31.4%(+7.7 pts)US over the same years: +15.3 pts
Homes owned by their occupants75.2% → 68.5%(−6.7 pts)US over the same years: +0.9 pts
Slidell's population equals 10% of St. Tammany Parish's. Its number of households without a car equals 19% of the county's. Its number of residents living in poverty equals 14% of the county's.
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)32.4%(637)
US avg: 26.4%
Gulf War (1990s)34.9%(687)
US avg: 24.3%
Vietnam era32.2%(634)
US avg: 33.1%
Korean War9%(178)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 1,967 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
Slidell, decade by decade
Slidell 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
24,124
$82,783
$163,205
23.7%
31.9
2000
25,695
$78,069
$164,313
22.0%
40.1
2010
27,068
$71,458
$232,185
21.8%
54.5
2020
28,781
$67,721
$203,501
23.4%
71.2
2024
28,561
$70,497
$217,700
31.4%
71.2
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.
