COUNTY
St. Tammany Parish
Louisiana · 279,108 residents (2025 est.) · 845 sq mi
Time machine
VIEWING
COMPARE TO
Part of the Slidell metro area
The short version
St. Tammany Parish is home to 272,421 people in Louisiana. Few US counties rank higher on income. 81,153 more people live here than in 2000. 79% of homes are owner-occupied. Households here earn about 34% more than in Louisiana as a whole. The foreign-born share is 4%.
At a glance
Average income
median household income $81,202, near the US median
US median: $82,259
Mid-age
median age 40.5
US median: 38.9
Average education
38% 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. Tammany Parish
What changed most since 1990
- Population144,508 → 272,421 (+89%)US over the same years: +35%
Among the 64 counties in Louisiana
- 4th in household income$81,202
- 3rd in share with a bachelor's degree37.7%
- 2nd in home value$284,000
- 53rd in diversity score56.4
Section 01
Population & growth
272,421
+42%since 2000
from 191,268 in 2000
279,108 in 2025 (Census Bureau estimate)
1990 – 2025
Land area
845 sq mi
Population, 1990 – 2024
2024272K
Age distribution, 2024
Under 55.7%(15,579)
5 to 97%(19,050)
10 to 146.4%(17,387)
15 to 196.7%(18,295)
20 to 245.4%(14,728)
25 to 3411.2%(30,474)
35 to 4413.3%(36,299)
45 to 5412.4%(33,816)
55 to 6413.4%(36,555)
65 to 7411.3%(30,693)
75 to 845.3%(14,372)
85 and over1.9%(5,173)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$81,202
−7%inflation adjusted, since 2000
from $47,883 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
53.8%
+14.8 ptssince 2009
from 39.0% in 2009
US average: 53.3%
Workforce by industry, 2024
Information10.1%
Wholesale trade8.1%
Other services7.2%
Finance & insurance6.4%
Retail trade5.7%
Public administration5.6%
Professional, scientific, technical5.3%
Transportation & warehousing3.2%
Agriculture, forestry, fishing2.1%
Manufacturing1.7%
Arts, entertainment, food1.6%
Education & health services1.1%
Construction0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$284,000
+34%inflation adjusted, since 2000
from $116,000 in 2000
US average: $376,019
1990 – 2024
3.5
+11%since 2009
from 3.1 in 2009
1990 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
31
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity
2000
White, non-Hispanic85.3%(163,061)
Black9.8%(18,788)
Hispanic / Latino2.5%(4,737)
Asian0.7%(1,413)
Other0%
2024
White, non-Hispanic72.4%(197,214)
Black12%(32,750)
Hispanic / Latino8.2%(22,407)
Asian1.3%(3,643)
Other6%(16,407)
56
+43%since 2009
from 39 in 2009
1990 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
31
−8%since 2020
from 34 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Central American2.8%(7,748)
Mexican2%(5,537)
Honduran1.8%(4,921)
Spaniard0.8%(2,205)
Puerto Rican0.6%(1,605)
South American0.3%(937)
Guatemalan0.3%(931)
Cuban0.2%(673)
Salvadoran0.2%(662)
Nicaraguan0.2%(606)
Colombian0.2%(435)
Dominican0.1%(211)
+ 9 more hispanic origin groups with data
Panamanian0.1%(186)
Costa Rican0.1%(156)
Peruvian0.1%(151)
Venezuelan0%(119)
Ecuadorian0%(114)
Argentine0%(97)
Chilean0%(13)
Bolivian0%(5)
Paraguayan0%(3)
Asian origin
Vietnamese0.5%(1,411)
Asian Indian0.2%(638)
Chinese0.2%(507)
Filipino0.1%(261)
Burmese0%(128)
Japanese0%(114)
Pakistani0%(103)
Nepalese0%(92)
Thai0%(78)
Korean0%(67)
Taiwanese0%(54)
Laotian0%(44)
+ 3 more asian origin groups with data
Ancestry
German14.9%(40,668)
French14.1%(38,458)
Irish13.1%(35,773)
English10.8%(29,399)
Italian10.3%(28,133)
American9.6%(26,266)
Scottish1.6%(4,223)
French Canadian1.5%(3,983)
Polish0.9%(2,374)
Scotch-Irish0.8%(2,265)
West Indian0.6%(1,551)
Arab0.5%(1,408)
+ 44 more ancestry groups with data
Norwegian0.5%(1,377)
Welsh0.5%(1,254)
British0.4%(1,179)
Dutch0.4%(1,156)
Swedish0.4%(1,045)
Subsaharan African0.3%(777)
Hungarian0.2%(633)
Trinidadian & Tobagonian0.2%(551)
Russian0.2%(529)
Lebanese0.2%(511)
Danish0.2%(511)
Austrian0.2%(505)
Haitian0.2%(457)
Greek0.2%(441)
Croatian0.2%(413)
Canadian0.1%(397)
Lithuanian0.1%(371)
Portuguese0.1%(348)
Syrian0.1%(322)
Nigerian0.1%(312)
Swiss0.1%(255)
Turkish0.1%(252)
Czech0.1%(230)
Ukrainian0.1%(202)
Slovak0.1%(173)
Israeli0.1%(170)
Belgian0.1%(166)
Brazilian0.1%(159)
Australian0.1%(154)
Finnish0%(127)
Iranian0%(126)
Barbadian0%(96)
Romanian0%(76)
Palestinian0%(75)
Jordanian0%(73)
Bulgarian0%(60)
Slovene0%(58)
Moroccan0%(39)
Armenian0%(37)
Egyptian0%(36)
Serbian0%(34)
Latvian0%(28)
Kenyan0%(18)
Jamaican0%(3)
Section 05
Education
High school or higher
92.0%
+8.1 ptssince 2000
from 83.9% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Women 20-64 in the labor force
73.9%
+3.7 ptssince 2020
from 70.2% in 2020
US average: 74.6%
Section 08
People & community
Computer in household
96.7%
+3.6 ptssince 2020
from 93.1% in 2020
US average: 95.5%
Marital status
Men 15+
Never married30.7%(32,802)
Married57.3%(61,189)
Widowed2.5%(2,640)
Divorced9.5%(10,190)
Women 15+
Never married26.4%(29,965)
Married51.5%(58,521)
Widowed8.6%(9,767)
Divorced13.5%(15,331)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage
Direct-purchase
12.4%
−2.1 ptssince 2020
from 14.5% in 2020
US average: 13.8%
VA health care
2.3%
−0.2 ptssince 2020
from 2.5% in 2020
US average: 2.2%
Any private
66.2%
−2.3 ptssince 2020
from 68.5% in 2020
US average: 67.1%
Any public
38.8%
+2.2 ptssince 2020
from 36.6% in 2020
US average: 36.7%
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)28%(4,326)
Gulf War (1990s)31%(4,796)
Vietnam era33.8%(5,229)
Korean War3.9%(605)
World War II0.3%(43)
Share of the 15,461 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. Tammany Parish, decade by decade
| Year | Population | Median household income | Median home value | Bachelor's degree+ | Diversity score |
|---|---|---|---|---|---|
| 1990 | 144,508 | $73,577 | $181,205 | 23.1% | 31.5 |
| 2000 | 191,268 | $87,226 | $211,312 | 28.3% | 32.8 |
| 2010 | 233,740 | $87,560 | $290,304 | 30.1% | 41.9 |
| 2020 | 264,570 | $85,728 | $270,648 | 34.3% | 56.1 |
| 2024 | 272,421 | $81,202 | $284,000 | 37.7% | 56.4 |
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.
Drill deeper
Places similar to St. Tammany Parish
Sussex County
Pop 277,140
Atlantic County
Pop 278,657
Henry County
Pop 264,922
Baldwin County
Pop 267,761
Places similar to St. Tammany ParishHead to head
Compare St. Tammany Parish to nearby counties
ST. TAMMANY PARISH VS
Orleans Parish
Income$56,631−30%
Home value$315,700+11%
Population362,154+30%
SEE FULL COMPARISON →
ST. TAMMANY PARISH VS
Hancock County
Income$67,708−17%
Home value$224,200−21%
Population46,873−83%
SEE FULL COMPARISON →
ST. TAMMANY PARISH VS
Tangipahoa Parish
Income$56,760−30%
Home value$212,900−25%
Population141,346−49%
SEE FULL COMPARISON →
ST. TAMMANY PARISH VS
Washington Parish
Income$45,380−44%
Home value$155,700−45%
Population44,937−84%
SEE FULL COMPARISON →
Frequently asked
How many people live in St. Tammany Parish, Louisiana?
St. Tammany Parish, Louisiana has about 272,421 residents according to the 2024 American Community Survey.
What is the median household income in St. Tammany Parish, Louisiana?
The typical household in St. Tammany Parish, Louisiana earns about $81,202 a year. Half of households make more than that, and half make less.
Is St. Tammany Parish, Louisiana expensive?
In St. Tammany Parish, Louisiana, the median home is worth about $284,000, and the typical rent is about $1,332 a month.
How educated are people in St. Tammany Parish, Louisiana?
About 37.7% of adults age 25 and over in St. Tammany Parish, Louisiana hold a bachelor's degree or higher.
What is the poverty rate in St. Tammany Parish, Louisiana?
About 11.4% of people in St. Tammany Parish, Louisiana live below the federal poverty line.
Has St. Tammany Parish, Louisiana grown since 1990?
Yes, St. Tammany Parish, Louisiana has grown since 1990. The population has added about 127,913 residents, a change of about 89 percent over that period.
Keep going
Explore from here
59 census tracts (top 20 by population)
Census Tract 403.09Census Tract 404.01Census Tract 403.08Census Tract 407.10Census Tract 407.05Census Tract 408.07Census Tract 412.11Census Tract 402.04Census Tract 408.06Census Tract 403.04Census Tract 407.08Census Tract 401.05Census Tract 410.03Census Tract 412.13Census Tract 407.06Census Tract 401.03Census Tract 403.06Census Tract 412.09Census Tract 412.07Census Tract 402.0316 ZIP codes
ZIP 70433ZIP 70458ZIP 70461ZIP 70448ZIP 70471ZIP 70435ZIP 70460ZIP 70447ZIP 70452ZIP 70445ZIP 70437ZIP 70420ZIP 70431ZIP 70457ZIP 70464ZIP 70463Up the hierarchy
All counties in LouisianaDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024