St. Tammany Parish, Louisiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Louisiana
The population of St. Tammany Parish, Louisiana is 269,331 as of the 2023 American Community Survey, making it the 4th-largest county in Louisiana. The median household income is $79,277, the median home value is $272,200, and the median age is 40.4.
The population of St. Tammany Parish has grown 18.4% since 2010 (234,564 → 277,615), a +1.21% annualized rate.
269,331
Population
+1.21%
Annual growth
319
People / sq mi
$79,277
Median Income
$272,200
Median Home Value
St. Tammany Parish covers 845 sq mi of land at 318.6 people per square mile.
About St. Tammany Parish, LA
St. Tammany Parish is a county in Louisiana with a population of 269,331. It ranks #4 among counties in Louisiana by population. The median age is 40.4, older than the national median. The population is 49.0% male and 51.0% female.
The median household income in St. Tammany Parish is $79,277, above the US median of $74,580. 9.5% of residents live below the federal poverty level. Home values sit at a median of $272,200, with monthly rent averaging $1,305. The homeownership rate of 78.8% is higher than the national rate of 64.8%.
Educational attainment in St. Tammany Parish reflects 36.6% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 12.4% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 31.4 minutes each way.
St. Tammany Parish Population History (2010-2024)
The county of St. Tammany Parish had a population of 234,564 in 2010 and 277,615 in 2024, a 18.4% growth over 14 years. The peak was 277,615 in 2024. Average annual growth rate: 1.21%.
277,615
Population (2024)
234,564
Population (2010)
277,615
Peak (2024)
1.21%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 234,564 |
| 2011 | 236,900 |
| 2012 | 239,154 |
| 2013 | 242,074 |
| 2014 | 245,390 |
| 2015 | 249,116 |
| 2016 | 252,676 |
| 2017 | 256,212 |
| 2018 | 258,598 |
| 2019 | 261,303 |
| 2020 | 265,007 |
| 2021 | 270,188 |
| 2022 | 273,494 |
| 2023 | 275,801 |
| 2024 | 277,615 |
Race & Ethnicity
| White | 75.0% |
| Black or African American | 12.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.0% |
Age & Sex
40.4
Median Age
51.0%
Female
49.0%
Male
18.0%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 18.0%
Income & Poverty
| Median household income | $79,277+$19,254 vs state |
| Mean household income | $106,854 |
| Per-capita income | $41,854 |
| Poverty rate | 9.5%-4.7% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 59.0% |
Top Industries by Employment
The largest employment sector in St. Tammany Parish is professional & business services, accounting for 24.4% of workers.
How residents commute
0.1%
Drive alone
0.8%
Carpool
77.4%
Public transit
12.4%
Work from home
31.4 min
Avg commute
Housing
$272,200+$63,500 vs state
Median home value
$1,305
Median rent
78.8%
Homeownership rate
112,414
Total housing units
91.9%
Occupied
8.1%
Vacant
21.2%
Renter-occupied
Social & access
92.7%
With health insurance
96.0%
With broadband internet
23.5%
Foreign-born
7.2%
Veterans (18+)
16.9%
With a disability
93.3%
Speak language other than English at home
Education
91.4%
High School+
36.6%
Bachelor's+
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Frequently Asked Questions
St. Tammany Parish, Louisiana has a population of 269,331 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Louisiana. Population density is 319 people per square mile.
The population of St. Tammany Parish has grown 18.4% since 2010 (234,564 → 277,615), a +1.21% annualized rate.
The median household income in St. Tammany Parish, Louisiana is $79,277, with mean (average) household income of $106,854 and per-capita income of $41,854. 9.5% of residents live below the federal poverty level.
In St. Tammany Parish, the largest racial and ethnic groups are White (75.0%), Black or African American (12.2%), Hispanic or Latino (2.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in St. Tammany Parish, Louisiana is 40.4 years. Residents are 51.0% female and 49.0% male.
The median home value in St. Tammany Parish is $272,200 and median monthly rent is $1,305. 78.8% of occupied housing units are owner-occupied. The county has 112,414 total housing units, 8.1% of which are vacant.
The largest employment sector in St. Tammany Parish, Louisiana is professional, scientific, and management services, employing 24.4% of workers. The unemployment rate is 3.0%.
New Orleans is among the largest cities associated with St. Tammany Parish, Louisiana, with a population of 376,035.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.