St. Tammany County, LA demographics:
population, income, and more

Total population
272,191
1.2% year-over-year change
Median household income
$78,282/yr
8.4% year-over-year change
Housing units
113,762
1.4% year-over-year change

St. Tammany County population

How many people live in St. Tammany County

St. Tammany County is home to 272,191 residents, according to the most recent Census data. Gender-wise, 49% of St. Tammany County locals are male, and 51% are female.

Total population
272,191
1.2% year-over-year change
Gender ratio
Male
49%
133,253
Female
51%
138,938
Value Percent YoY change
Male 133,253 49% 1.1%
Female 138,938 51% 1.3%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in St. Tammany County is 41, with the population distributed as follows: about 19.1% are children under 15, then 12.1% are in the 15 to 24 age group. Adults between 25 and 44 make up 24.5% of the population, while another 25.8% fall into the 45 to 64 bracket. Finally, around 18.5% are 65 or older.

Median age
41.2
Age breakdown
Under 15
19.1%
15 to 24
12.1%
25 to 44
24.5%
45 to 64
25.8%
Over 65
18.5%
Value Percent YoY change
Under 15 51,888 19.1% 0.1%
15 to 24 33,012 12.1% 1.9%
25 to 44 66,761 24.5% 1.3%
45 to 64 70,285 25.8% -0.1%
Over 65 50,245 18.5% 3.7%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In St. Tammany County, 94.6% of the population are US-born citizens, while 3% have gained naturalized citizenship. At the same time, 2.4% of residents are non-citizens. As for race, 73.9% of locals are Caucasian, 12.2% are African American and 1.4% have Asian roots. Another 0.8% are Indigenous American, 0.4% are Pacific Islanders, while 1.7% identify as another race. There’s also a share of 9.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
94.6%
Non-U.S.-born citizens
3%
Non-citizens
2.4%
Value Percent YoY change
U.S.-born citizens 257,579 94.6% 0.9%
Non-U.S.-born citizens 8,030 3% 10.4%
Non-citizens 6,582 2.4% 0.4%
Racial breakdown
White
73.9%
Black or African American
12.2%
American Indian and Alaska Native
0.8%
Asian
1.4%
Native Hawaiian and other Pacific Islander
0.4%
Two or more races
9.7%
Other
1.7%
Value Percent
White 201,053 73.9%
Black or African American 33,257 12.2%
American Indian and Alaska Native 2,079 0.8%
Asian 3,710 1.4%
Native Hawaiian and other Pacific Islander 952 0.4%
Two or more races 26,453 9.7%
Other 4,687 1.7%

Households in St. Tammany County

A peek inside St. Tammany County households

St. Tammany County has 104,932 households, with an average of 3 members in each. Of these, 70% are families, while the remaining 30% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
104,932
1.7% year-over-year change
Average people per household
3
Non-family households
31,443
Family households
73,489
Value Percent YoY change
Non-family households 31,443 30% 2.5%
Family households 73,489 70% 1.4%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in St. Tammany County

The housing landscape of St. Tammany County

St. Tammany County's housing consists of 113,762 units, with 77.4% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.6% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 6.4% of the housing landscape.

Housing units
113,762
1.4% year-over-year change
Housing types
Value Percent
1 unit, detached 88,035 77.4%
1 unit, attached 2,939 2.6%
2 units 2,217 2%
3 or 4 units 2,752 2.4%
5 to 9 units 2,153 1.9%
10 to 19 units 3,031 2.7%
20 to 49 units 2,539 2.2%
50 or more units 2,656 2.3%
Mobile home 7,312 6.4%
Boat, RV, van, etc. 128 0.1%
Homes built since 2020
3,776
54.0% year-over-year change

The age of buildings in St. Tammany County

In St. Tammany County, the median construction year is 1994. About 1.6% of homes were built before the 1940s, with another 1.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 23.5% of homes were added from 2000 to 2009, 14.1% between 2010 and 2019, and 3.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,792 1.6% -6.5%
Built between 1940 and 1949 1,211 1.1% 29.8%
Built between 1950 and 1959 1,836 1.6% -15.6%
Built between 1960 and 1969 5,176 4.6% 2.1%
Built between 1970 and 1979 14,397 12.7% -8.3%
Built between 1980 and 1989 20,168 17.7% 6.7%
Built between 1990 and 1999 22,545 19.8% -1.8%
Built between 2000 and 2009 26,783 23.5% -2.2%
Built between 2010 and 2019 16,078 14.1% 9.3%
Built in 2020 or later 3,776 3.3% 54.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

St. Tammany County occupancy rates

Out of the 104,932 occupied housing units in St. Tammany County, 78.8% are owner-occupied, while 21.2% are lived in by tenants. Meanwhile, 7.8% of all homes on the local market sit vacant.

Occupied housing units
104,932
1.7% year-over-year change
Occupancy breakdown
Renter occupied
22,198
Owner occupied
82,734
Value Percent YoY
change
Renter occupied 22,198 21.2% 1.5%
Owner occupied 82,734 78.8% 1.8%
Unoccupied housing units
7.8%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

St. Tammany County housing costs

Housing costs in St. Tammany County come to a median of $1,298 per month, while tenants specifically pay a median gross rent of $1,252.

Median housing costs per month
$1,298/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in St. Tammany County
$1,252/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in St. Tammany County

St. Tammany County education at a glance

About 31.3% of the population in St. Tammany County went to high school, while 23.7% pursued college studies. Another 7% earned an associate degree and 23% hold a bachelor’s. Meanwhile, 12.3% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 5,642 2.7% -2.7%
High school diploma 65,059 31.3% -0.3%
College diploma 49,248 23.7% -0.6%
Associate degree 14,622 7% 2.2%
Bachelor's degree 47,804 23% 4.2%
Graduate degree 25,553 12.3% 5.7%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in St. Tammany County

How much people earn in St. Tammany County

The average annual household income in St. Tammany County was $102,142 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +10.2% change from the previous year. At the same time, the median income stood at $78,282, reflecting a +8.4% shift over the same period.

Average household income in St. Tammany County
$102,142/year
10.2% year-over-year change
Median household income in St. Tammany County
$78,282/year
8.4% year-over-year change

St. Tammany County income by age

In St. Tammany County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $93,535. Those with someone between 45 and 64 in charge, often well established professionally, earn $105,045 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $71,923, while those led by someone over 65, many of whom may be retired, have about $52,184 in earnings. Overall, 88.7% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $71,923 15.5%
25 - 44 $93,535 0.6%
45 - 64 $105,045 26.2%
Over 65 $52,184 -2.7%
Above poverty level
236,544
Below poverty level
30,095
Value Percent YoY
change
Above poverty level 236,544 88.7% 2.3%
Below poverty level 30,095 11.3% -4.8%

Employment in St. Tammany County

Workforce and job types in St. Tammany County

82% of the working population are employed in professional or administrative positions, while 18% are in hands-on or service-based jobs. Also, 13% run their own businesses, 64.7% are employed by private companies, and 14.4% work in the public sector.

Workforce demographics

White collar
104,910
Blue collar
22,954
Value Percent YoY change
White collar 104,910 82% 1.8%
Blue collar 22,954 18% 1.6%
Employer type
Self employees
13%
Private companies
64.7%
Governmental workers
14.4%
Not for profit companies
7.9%
Value Percent YoY change
Self employees 16,647 13% -4.8%
Private companies 82,782 64.7% 1.5%
Governmental workers 18,388 14.4% 6.3%
Not for profit companies 10,047 7.9% 8.3%

Transportation in St. Tammany County

How people get around in St. Tammany County

In St. Tammany County, the average commute time is 227 minutes. Commuting methods vary: 98.7% of residents travel by personal vehicle and 1% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
227 min
108.3% year-over-year change
Means of transportation
Value Percent YoY change
Car 106,062 98.7% 1.0%
Taxicab 57 0% -56.5%
Bus or trolleybus 81 0.1% -36.7%
Bicycle 262 0.2% 16.4%
Walk 1,022 1% -0.1%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in St. Tammany County by zipcode?

Zipcode Population Number of households Median income Average income
70431 5,769 2,247 $69,813 $95,378
70433 41,876 17,468 $81,241 $116,615
70435 22,475 8,481 $80,926 $102,159
70437 8,030 3,296 $61,280 $87,449
70445 9,288 3,621 $78,394 $100,828
70447 17,897 6,003 $122,574 $161,220
70448 26,338 9,923 $95,682 $126,081
70452 12,650 4,895 $62,917 $83,793
70458 39,034 15,483 $72,843 $91,197
70420 7,950 2,883 $78,171 $99,532

Find your place

Explore more communities

FAQs about St. Tammany County demographics 

What is the total population of St. Tammany County?

St. Tammany County has a total population of 272,191 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.2% compared to a year ago.

What is the gender ratio in St. Tammany County?

The gender ratio in St. Tammany County is as follows:
  • 49% males (133,253 residents)
  • 51% females (138,938 residents)

What is the median age in St. Tammany County?

The median age in St. Tammany County is 41.2.

What is the age distribution of the population in St. Tammany County?

The age distribution in St. Tammany County is as follows:
  • Under 15: 19.1% (51,888 residents)
  • Ages 15-24: 12.1% (33,012 residents)
  • Ages 25-44: 24.5% (66,761 residents)
  • Ages 45-64: 25.8% (70,285 residents)
  • Over 65: 18.5% (50,245 residents)

What is the racial and ethnic makeup of St. Tammany County?

The racial and ethnic makeup of St. Tammany County is as follows:
  • White: 73.9% (201,053 residents)
  • Black or African American: 12.2% (33,257 residents)
  • American Indian and Alaska Native: 0.8% (2,079 residents)
  • Asian: 1.4% (3,710 residents)
  • Native Hawaiian and Other Pacific Islander: 0.4% (952 residents)
  • Two or More Races: 9.7% (26,453 residents)
  • Other: 1.7% (4,687 residents)

What percentage of the population in St. Tammany County are U.S.-born citizens?

U.S.-born citizens represent 94.6% of the population in St. Tammany County.

How many housing units are there in St. Tammany County?

There are 113,762 housing units in St. Tammany County, reflecting a +1.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in St. Tammany County and what is the average household size?

St. Tammany County has a total of 104,932 households, with an average of 3 people in each.

What is the median household income in St. Tammany County?

St. Tammany County has a median household income of $78,282, representing a +8.4% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for St. Tammany County?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 82% (104,910 residents)
  • Blue-collar workers: 18% (22,954 residents)

Places of employment:
  • Self-employed: 13% (16,647 residents)
  • Private companies: 64.7% (82,782 residents)
  • Governmental workers: 14.4% (18,388 residents)
  • Not-for-profit companies: 7.9% (10,047 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025