City · Louisiana
Slidell, Louisiana
Slidell, city, in St. Tammany Parish, Louisiana. Slidell had 28,341 residents on July 1, 2025 by the Census Bureau's estimate, down 1.1% since 2020; the 2020 Census counted 28,781 and the ACS 2020-2024 5-year estimates put it at 28,561 (±54). GEOID 2270805.
Residents, July 2025 estimate
28,341
Census Bureau estimate (no margin published)
2020 Census count: 28,781 · ACS 2020-2024: 28,561 ±54
Median household income
$70,497
±$7,225 (90% margin)
Louisiana: $60,756
Median home value
$217,700
±$6,934 (90% margin)
Louisiana: $216,500
Median gross rent
$1,375
±$78 (90% margin)
Louisiana: $1,064
Where is Slidell and what county is it in?
Slidell is a city in St. Tammany Parish, Louisiana. It covers 15.2 square miles of land, 1,892 residents per square mile in 2020.
Slidell is in the Slidell-Mandeville-Covington, LA metropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Slidell, and is it growing?
The Census Bureau estimates that 28,341 people lived in Slidell on July 1, 2025, down 1.1% since 2020, in line with Louisiana (−0.9%). The 2020 Census counted 28,781 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 28,561 (±54).
| Measure | Slidell | St. Tammany Parish | Change since 2015-2019 |
|---|---|---|---|
| Total population | 28,561 ±54 | 272,421 | +739 |
| Households | 10,995 ±606 | 105,082 | +1,177 |
| Average household size | 2.56 ±0.14 | 2.57 | −0.23 |
| Housing units | 12,203 ±563 | 113,911 | +1,388 |
Slidell's population since 2000
From 25,695 in 2000 to 28,341 in 2025: up 10.3%. The 2000, 2010 and 2020 figures are census counts, each for Slidell as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Slidell?
The median resident of Slidell is 38.9 years old; 23.7% are under 18 and 21.4% are 65 or older. The largest group is non-Hispanic white residents at 61.4%, then non-Hispanic Black residents at 19.6%. 4.5% of residents were born outside the United States.
| Measure | Slidell | St. Tammany Parish | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.9 ±2.0 | 40.5 | no clear change |
| Under 18 years | 23.7% ±2.6 pts | 23.6% | – |
| 65 years and over | 21.4% ±2.7 pts | 18.4% | – |
| Male | 48.1% ±2.0 pts | 48.9% | – |
| Hispanic or Latino (any race) | 9.8% ±2.4 pts | 8.2% | no clear change |
| White alone, not Hispanic | 61.4% ±4.1 pts | 72.4% | −10.4 pts |
| Black or African American alone, not Hispanic | 19.6% ±3.7 pts | 12.0% | no clear change |
| Asian alone, not Hispanic | 2.1% ±1.1 pts | 1.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.2 pts | 0.3% | – |
| Two or more races, not Hispanic | 6.7% ±2.3 pts | 4.6% | – |
| Some other race alone, not Hispanic | 0.3% ±0.4 pts | 0.8% | – |
| Born outside the United States | 4.5% ±1.3 pts | 4.5% | no clear change |
| Speak a language other than English at home (age 5+) | 8.6% ±2.7 pts | 7.0% | – |
| Civilian veterans (age 18+) | 9.2% ±1.7 pts | 7.5% | – |
| With a disability | 20.1% ±3.0 pts | 16.1% | – |
| No health insurance coverage | 11.9% ±2.2 pts | 6.8% | no clear change |
| High school graduate or higher (age 25+) | 90.0% ±2.3 pts | 92.0% | – |
| Bachelor's degree or higher (age 25+) | 31.4% ±3.8 pts | 37.7% | +6.3 pts |
| Graduate or professional degree (age 25+) | 9.9% ±1.8 pts | 13.4% | – |
| Lived in the same house a year earlier | 83.6% ±3.6 pts | 88.5% | – |
| Moved from another state in the past year | 5.7% ±2.3 pts | 2.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Slidell earn?
Half of Slidell's 10,995 households earn less than $70,497 a year (±$7,225), against $81,202 in St. Tammany Parish and $60,756 in Louisiana. In 2015-2019 it was $67,572 in 2024 dollars; the margins of error cannot tell the two periods apart. 15.7% of residents live below the poverty line.
| Measure | Slidell | St. Tammany Parish | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $70,497 ±$7,225 | $81,202 | no clear change |
| Mean household income | $86,034 ±$6,703 | $109,896 | – |
| Per capita income | $34,749 ±$2,943 | $43,364 | no clear change |
| People below the poverty line | 15.7% ±3.7 pts | 11.4% | no clear change |
| Children under 18 below the poverty line | 26.8% ±8.1 pts | 15.0% | no clear change |
| Households receiving SNAP | 13.9% ±3.3 pts | 9.0% | – |
| Households with a computer | 95.9% ±1.9 pts | 96.7% | – |
| Households with a broadband subscription | 95.5% ±1.6 pts | 94.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Slidell?
Owners occupy 68.5% of Slidell's occupied homes and renters 31.5%. The median owner-occupied home is valued at $217,700 by its owner (±$6,934). The median renter pays $1,375 a month including utilities, and 48.6% of renters pay 35% or more of their income on rent.
| Measure | Slidell | St. Tammany Parish | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $217,700 ±$6,934 | $284,000 | +$18,697 |
| Median gross rent | $1,375 ±$78 | $1,332 | no clear change |
| Renters paying 35% or more of income on rent | 48.6% ±8.2 pts | 42.8% | no clear change |
| Median monthly owner costs, with a mortgage | $1,609 ±$64 | $1,813 | – |
| Owner-occupied homes | 68.5% ±4.3 pts | 78.9% | no clear change |
| Renter-occupied homes | 31.5% ±4.3 pts | 21.1% | – |
| Housing units | 12,203 ±563 | 113,911 | +1,388 |
| Homeowner vacancy rate | 2.5% ±2.0 pts | 1.1% | – |
| Rental vacancy rate | 9.7% ±5.7 pts | 6.6% | – |
| Single-family detached homes | 72.4% ±3.4 pts | 77.4% | – |
| Mobile homes | 0.3% ±0.3 pts | 6.5% | – |
| Built 2020 or later | 1.8% ±1.2 pts | 3.3% | – |
| Built 2010 to 2019 | 6.4% ±2.1 pts | 14.1% | – |
| Built 1939 or earlier | 3.5% ±1.3 pts | 1.6% | – |
| Households with no vehicle | 7.5% ±2.7 pts | 4.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Slidell building?
Builders took permits for 13 new housing units in Slidell in 2025 (7 in single-family houses), 0.5 per 1,000 residents against 3.1 across Louisiana.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Slidell work and get to work?
77.6% of Slidell's workers drive alone and 11.1% work from home. The average trip to work takes 29.1 minutes. The unemployment rate in 2020-2024 averaged 5.8%.
| Measure | Slidell | St. Tammany Parish | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 60.4% ±3.4 pts | 62.9% | – |
| Unemployment rate | 5.8% ±1.8 pts | 4.8% | no clear change |
| Drove alone to work | 77.6% ±4.1 pts | 77.1% | – |
| Carpooled | 8.7% ±2.4 pts | 7.2% | – |
| Public transportation | 0.5% ±0.5 pts | 0.1% | – |
| Walked | 0.7% ±0.8 pts | 0.8% | – |
| Worked from home | 11.1% ±3.6 pts | 13.2% | +6.5 pts |
| Mean travel time to work | 29.1 min ±2.3 | 31.5 min | +2.9 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Slidell?
7 census tracts lie mostly in Slidell, and 9 more reach into it (2020 census blocks). Their median household incomes run from $50,365 (Tract 409) to $88,657 (Tract 410.03).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 410.03St. Tammany Parish | 5,915 | $88,657 |
| Tract 410.04St. Tammany Parish | 4,767 | $84,970 |
| Tract 409St. Tammany Parish | 3,505 | $50,365 |
| Tract 410.02St. Tammany Parish | 3,490 | $77,747 |
| Tract 407.10St. Tammany Parish | 7,808 | $120,147 |
| Tract 408.01St. Tammany Parish | 4,451 | $59,815 |
| Tract 411.04St. Tammany Parish | 3,115 | $63,750 |
| Tract 411.05St. Tammany Parish | 4,618 | $80,172 |
| Tract 411.03St. Tammany Parish | 3,561 | $58,013 |
| Tract 407.05St. Tammany Parish | 7,700 | $61,079 |
| Tract 407.11St. Tammany Parish | 4,194 | $53,723 |
| Tract 408.07St. Tammany Parish | 7,419 | $71,022 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Slidell) · Census block assignment files
How does Slidell compare with other places in Louisiana?
By the Census Bureau's July 2025 estimates, Slidell is the 1,416th-most populous of the 19,476 U.S. incorporated places that have one and the 12th-most populous of 304 in Louisiana.
Slidell ranks 70th of 251 places in Louisiana with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 12th | 304 |
| Growth 2020-2025 (PEP) | 54th | 156 |
| Residents per square mile | 49th | 263 |
| Median household income | 70th | 251 |
| Per capita income | 77th | 263 |
| Median home value | 76th | 247 |
| Median gross rent | 25th | 229 |
| Poverty rate | 159th | 216 |
| Bachelor's degree or higher | 42nd | 229 |
| Median age | 110th | 262 |
| Owner-occupied share | 140th | 260 |
| Work from home | 24th | 87 |
| Travel time to work | 57th | 260 |
Slidell's figures with every place in Louisiana (CSV)
Every place in Louisiana, sortable · Compare Slidell with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Slidell?
8 of the 57 figures for Slidell on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Slidell are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Slidell.