Demographics of St. Tammany Parish, Louisiana

St. Tammany Parish, Louisiana had 279,108 people on July 1, 2025, by the Census Bureau’s estimate: +14,119 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

St. Tammany Parish, in four figures

279,108
Population: July 1, 2025, Vintage 2025 estimate.; +5.3%
Change since July 2020: +14,119 people.; 40.5 ±0.3
Median age: ACS 2020–⁠2024.; $81,202 ±$1,958
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

St. Tammany Parish, Louisiana's population grew 5.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of St. Tammany Parish, Louisiana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

St. Tammany Parish, Louisiana's population grew 5.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of St. Tammany Parish, Louisiana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	264,989	100.0	100.0
2021	270,178	102.0	100.2
2022	273,650	103.3	100.7
2023	275,871	104.1	101.6
2024	277,665	104.8	102.5
2025	279,108	105.3	103.1

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Population of St. Tammany Parish, Louisiana on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	264,989	+424	−111	+12	+462
2021	270,178	+5,189	+167	+192	+4,885
2022	273,650	+3,472	+94	+902	+2,572
2023	275,871	+2,221	+103	+932	+1,225
2024	277,665	+1,794	+57	+1,191	+573
2025	279,108	+1,443	+87	+632	+720

Age, 2020–2024

The median age is 40.5 ±0.3: for men 39.4 ±0.3 and for women 41.7 ±0.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in St. Tammany Parish by age, ACS 2020–2024
Age	People	Share	Louisiana	United States
Under 5	15,579 ±38	5.7% ±<0.1	6.2% ±<0.1	5.6% ±<0.1
5 to 17	48,718 ±1,445	17.9% ±0.5	17.3% ±0.1	16.3% ±<0.1
18 to 24	20,742 ±1,043	7.6% ±0.4	9.1% ±0.1	9.1% ±<0.1
25 to 44	66,773 ±1,452	24.5% ±0.5	26.6% ±0.1	26.9% ±<0.1
45 to 64	70,371 ±1,365	25.8% ±0.5	24.1% ±0.1	24.8% ±<0.1
65 and over	50,238 ±1,479	18.4% ±0.5	16.7% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $81,202 ±$1,958, and income per person $43,364 ±$1,249, in 2024 dollars. The median is $60,756 ±$408 in Louisiana and $80,734 ±$166 in the United States.

Households by income

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Households in St. Tammany Parish by income, ACS 2020–2024
Household income	Households	Share	Louisiana	United States
Under $25,000	14,522 ±1,160	13.8% ±1.1	22.4% ±0.3	14.6% ±<0.1
$25,000 to $49,999	16,728 ±1,288	15.9% ±1.2	20.2% ±0.3	16.7% ±<0.1
$50,000 to $74,999	17,330 ±1,066	16.5% ±1.0	15.9% ±0.2	15.5% ±<0.1
$75,000 to $99,999	14,013 ±1,068	13.3% ±1.0	11.7% ±0.2	12.6% ±<0.1
$100,000 to $149,999	19,280 ±1,367	18.3% ±1.3	14.8% ±0.3	17.5% ±<0.1
$150,000 to $199,999	9,996 ±1,009	9.5% ±1.0	7.3% ±0.2	9.6% ±<0.1
$200,000 or more	13,213 ±942	12.6% ±0.9	7.8% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in St. Tammany Parish by age, ACS 2020–2024
Age	Below poverty	Rate	Louisiana	United States
All ages	30,699 ±3,041	11.4% ±1.1	18.9% ±0.3	12.5% ±0.1
Under 18	9,451 ±1,199	15.0% ±1.8	25.4% ±0.5	16.1% ±0.1
18 to 59	14,296 ±1,661	10.3% ±1.2	17.7% ±0.3	11.6% ±0.1
60 and over	6,952 ±773	10.3% ±1.1	15.2% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in St. Tammany Parish, ACS 2020–2024
Measure	St. Tammany Parish	Louisiana	United States
Housing units	113,911 ±77	2,108,902 ±333	143,775,355 ±10,234
Occupied	92.2% ±0.8	85.6% ±0.2	89.9% ±0.1
Vacant	7.8% ±0.8	14.4% ±0.2	10.1% ±0.1
Owner occupied	78.9% ±0.8	67.4% ±0.4	65.2% ±0.3
Renter occupied	21.1% ±1.2	32.6% ±0.3	34.8% ±0.1
Median home value	$284,000 ±$5,856	$216,500 ±$1,367	$332,700 ±$236
Median gross rent	$1,332 ±$35	$1,064 ±$8	$1,413 ±$2
Median year built	1995 ±2	1983 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in St. Tammany Parish by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Louisiana	United States
Hispanic or Latino	22,407 ±0	8.2% ±<0.1	7.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	197,214 ±944	72.4% ±0.3	55.7% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	32,750 ±1,300	12.0% ±0.5	30.5% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	3,643 ±377	1.3% ±0.1	1.7% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	581 ±145	0.2% ±0.1	0.4% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	167 to 1,681	0.1% to 0.6%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	2,235 ±882	0.8% ±0.3	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	12,667 ±1,345	4.6% ±0.5	3.8% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in St. Tammany Parish by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Louisiana	United States
Born in the state	193,756 ±2,981	71.1% ±1.1	77.2% ±0.2	57.3% ±<0.1
Born in another state	64,056 ±2,946	23.5% ±1.1	17.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	2,381 ±587	0.9% ±0.2	0.7% ±<0.1	1.7% ±<0.1
Born abroad	12,228 ±1,426	4.5% ±0.5	4.9% ±0.1	14.1% ±<0.1
Naturalized citizens	5,634 ±674	2.1% ±0.2	2.0% ±0.1	7.4% ±<0.1
Not citizens	6,594 ±1,164	2.4% ±0.4	2.9% ±0.1	6.8% ±<0.1

St. Tammany Parish among the counties of Louisiana

4th of 64 by population, July 2025. Every one is listed on the Louisiana page.

Counties of Louisiana near St. Tammany Parish in population, July 2025
County	July 2025	Change since 2020
East Baton Rouge Parish	456,180	+0.1%
Jefferson Parish	431,398	−1.9%
Orleans Parish	362,154	−5.5%
St. Tammany Parish	279,108	+5.3%
Lafayette Parish	257,949	+6.5%
Caddo Parish	224,226	−5.4%
Calcasieu Parish	208,466	−3.7%
Ouachita Parish	158,542	−1.0%
Livingston Parish	155,036	+8.5%

Elsewhere on the site

Rankings this appears in

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026