St. Tammany Parish, Louisiana Demographics 2026

Name: St. Tammany Parish, Louisiana Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

St. Tammany Parish, Louisiana has a population of 272,421, the 4th most populous county in Louisiana. The median household income is $81,202 and the median home value is $284,000. The poverty rate is 11.4%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

St. Tammany Parish Quick Facts

Population 272,421

Median Household Income $81,202

Median Home Value $284,000

Poverty Rate 11.4%

Unemployment Rate 4.8%

Median Age 40.5 years

Homeownership Rate 78.9%

Affordability Ratio 3.5x

Bachelor's Degree+ 37.7%

High School Graduation 92.0%

Cities/Places 11

Population 272,421 4th of 64

Median Income $81,202 34% higher than state

Poverty Rate 11.4%

Unemployment 4.8%

How St. Tammany Parish Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	269,331	272,421	+1.1%
Median household income	$79,277	$81,202	+2.4%
Median home value	$272,200	$284,000	+4.3%

Median Household Income

St. Tammany Parish

$81,202

$60,756

National

$80,734

Median Home Value

St. Tammany Parish

$284,000

$216,500

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 13.8%

$25K-$50K 15.9%

$50K-$100K 29.8%

$100K+ 40.4%

Detailed income brackets

Under $10K

4.2%

$10K-$15K

3.0%

$15K-$20K

3.2%

$20K-$25K

3.4%

$25K-$30K

2.9%

$30K-$35K

3.2%

$35K-$40K

2.9%

$40K-$45K

3.7%

$45K-$50K

3.1%

$50K-$60K

6.7%

$60K-$75K

9.8%

$75K-$100K

13.3%

$100K-$125K

10.6%

$125K-$150K

7.8%

$150K-$200K

9.5%

$200K+

12.6%

Employment

4.8% Unemployment Rate State: 6.3%|National: 5.2%

62.9% Labor Force Participation

Housing Overview

Owner 78.9%

Renter 21.1%

Affordability Index Affordable

3.5x home value to income ratio

Median gross rent $1,332/mo 19.7% of median household income annually

People & Demographics

Age Distribution

Under 18

23.6%

18-34

18.8%

35-54

25.7%

55-74

24.7%

75+

7.2%

Race & Ethnicity

Diversity Index

Moderate Diversity

Moderate diversity with one or two groups making up the majority.

State average: 59 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in St. Tammany Parish

City	Population	Median Income	Poverty	Home Value
Slidell	28,561	$70,497	15.7%	$217,700
Mandeville	12,946	$94,405	7.1%	$376,100
Covington	11,658	$75,851	11.7%	$295,100
Eden Isle	7,683	$78,426	4.8%	$371,600
Lacombe	6,310	$72,813	18.0%	$207,900
Abita Springs	2,699	$77,257	8.7%	$269,300
Pearl River	2,614	$56,719	17.9%	$235,200
Madisonville	869	$109,583	3.6%	$399,600
Folsom	709	$62,375	12.6%	$226,000
Lewisburg	484	$155,179	0.0%	$481,400
Sun	381	N/A	11.6%	$160,700

Explore Louisiana Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

St. Tammany Parish is located in Louisiana with a total population of 272,421. It is the 4th most populous county out of 64 in Louisiana. The county encompasses 11 Census-designated places.

Age Demographics

The median age in St. Tammany Parish is 40.5 years. This is 7% higher than the state median of 38.0 years.

Economy, Income & Housing

The median household income in St. Tammany Parish is $81,202. This is 34% higher than the state median of $60,756. It is also about the same as the national median of $80,734. The poverty rate stands at 11.4%. This is 40% lower than the state poverty rate of 18.9%. The unemployment rate is 4.8%. This is 24% lower than the state rate of 6.3%. The median home value is $284,000. Housing costs are 31% higher than the state median of $216,500. The home-value-to-income ratio is 3.5x. 78.9% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 67.4%.

Race & Ethnicity

The largest racial or ethnic group in St. Tammany Parish is White (non-Hispanic), making up 72.4% of the population. Black or African American residents account for 12.0%. The Black or African American population (12.0%) is well below the state average of 30.5%.

Education

37.7% of residents aged 25 and older hold a bachelor's degree or higher. This places St. Tammany Parish in the top 10% of all counties in the state for educational attainment. This is 39% higher than the state rate of 27.0%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.0%.

Data Sources & Methodology

All figures for St. Tammany Parish come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Louisiana and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of St. Tammany Parish, Louisiana?

St. Tammany Parish has a population of 272,421, making it the 4th most populous county in Louisiana.

What is the median income in St. Tammany Parish?

The median household income in St. Tammany Parish is $81,202 with a poverty rate of 11.4%.

How many cities are in St. Tammany Parish, Louisiana?

St. Tammany Parish contains 11 Census-designated places.