St. Tammany Parish, Louisiana Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
St. Tammany Parish, LA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageHealthiest county in Louisiana
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B
Income Around averageAmong the top 3 wealthiest counties in Louisiana
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B
Education Around averageAmong the top 3 best educated counties in Louisiana
Source: Map AI Methodology
Population: density and quick facts
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Population | 272,409 | 4,610,276 | 337,468,954 |
| Population density (per sq mi) | 248.3 | 88.0 | 86.4 |
| Population growth (%/yr) | 1.27% | -0.10% | 0.59% |
| Median age | 40.9 | 35.9 | 37.3 |
| Households | 105,070 | 1,803,262 | 130,235,071 |
Population in St. Tammany Parish grew by 20.8% from 2009 to 2024, reaching 272,409 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in St. Tammany Parish is Gen X, aged 45–60, at 20.9% of residents. That is 1.6 points above Louisiana as a whole.
- Gen Z 13–28 54,175 19.9% -1.6 pts
- Millennials 29–44 56,698 20.8% -1.0 pts
- Gen X 45–60 57,037 20.9% +1.6 pts
- Boomers 61–79 48,067 17.6% +0.5 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Louisiana, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.9% of the people living in St. Tammany Parish and men 49.1%.
- Women 50.9% Louisiana 51.1%
- Men 49.1% Louisiana 48.9%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in St. Tammany Parish
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Economy
St. Tammany Parish has a the economy index of B, which means it is quite prosperous.
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Median household income | $82,063 | $60,934 | $80,455 |
| Income growth (%/yr) | 3.25% | 3.69% | 4.80% |
| Unemployment rate | 4.7% | 6.2% | 5.2% |
The median household income in St. Tammany Parish is about 35% higher than in Louisiana.
Housing
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Median home price | $222,336 | $170,446 | $248,835 |
| Median rent | $1,331 | $1,063 | $1,407 |
| Homeownership rate | 78.9% | 67.4% | 65.2% |
The median home price in St. Tammany Parish is about 13.9 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,331 per month for that long.
Commute Time & Mobility
Commuters in St. Tammany Parish spend about 54 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 224 hours, about 9.3 full days, spent commuting.
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 26.8 | 21.3 | 22.4 |
| Round-trip commute (min) | 53.7 | 42.5 | 44.8 |
| Yearly time spent (hours) | 224 | 177 | 187 |
| Estimated yearly cost | $6,936 | $5,493 | $5,790 |
| Work from home | 13.2% | 8.1% | 15.0% |
| Highway traffic (vehicles/day) | 13,914 | 8,275 | 8,813 |
| Local road traffic (vehicles/day) | 1,606 | 1,164 | 1,355 |
Fastest commutes among counties in
Louisiana:
East Carroll Parish (11.4 min), Madison Parish (13.1 min), St. Mary Parish (15.5 min).
Slowest:
West Feliciana Parish (32.8 min), East Feliciana Parish (32.8 min), St. Helena Parish (32.4 min).
The average commute time in St. Tammany Parish is 27 minutes, longer than the 21 minutes in Louisiana.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
St. Tammany Parish has a education index of B, which means it is quite educated.
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 33.7% | 24.0% | 31.6% |
| Average household size | 2.57 | 2.49 | 2.53 |
Highest education index among counties in
Louisiana:
Orleans Parish (0.3), East Baton Rouge Parish (0.3), St. Tammany Parish (0.3).
Lowest:
East Carroll Parish (0.1), Assumption Parish (0.2), Evangeline Parish (0.2).
Health
St. Tammany Parish has a health index of B, which means it is quite healthy.
| Metric | St. Tammany Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.6 | 75.1 | 78.3 |
| Self-rated poor health | 15.6% | 22.3% | 16.3% |
| Smokers | 18.3% | 23.9% | 19.0% |
Highest health index among counties in
Louisiana:
St. Tammany Parish (0.8), Ascension Parish (0.8), Vernon Parish (0.8).
Lowest:
East Carroll Parish (0.7), Madison Parish (0.7), Tensas Parish (0.7).
St. Tammany Parish, LA Compared With Nearby Counties
St. Tammany Parish, LA is the 2nd largest of the 6 counties compared here, 272,409 residents against a local median of 57,458. The measure that sets St. Tammany Parish, LA apart most is median household income: $82,063, 42% above the local median of $57,755. That is the better end of the local range on this measure.
Commute tells the same story from another angle: 26.8 min against a local median of 22.9 min, 17% above it. The picture is mixed rather than uniform: median household income runs ahead of the neighbourhood while commute runs behind it, so St. Tammany Parish, LA is trading one against the other rather than simply out-performing what surrounds it. The counties themselves spread $22,810 on median household income, so St. Tammany Parish, LA sits at one end of an already wide local range rather than apart from it. St. Tammany Parish, LA has the highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| St. Tammany Parish, LA | 272,409 | $82,063 #1/6 | $222,336 #3/6 | 26.8 min #4/6 |
| Orleans Parish, LA | 371,664 | $56,737 | $311,601 | 20.7 min |
| Washington Parish, LA | 45,116 | $45,367 | $118,749 | 22.8 min |
| Hancock County, MS | 46,167 | $68,178 | $168,303 | 30.7 min |
| Tangipahoa Parish, LA | 136,737 | $57,755 | $320,527 | 22.9 min |
| Pearl River County, MS | 57,458 | $58,730 | $207,108 | 28.3 min |
Frequently Asked Questions
Common questions about St. Tammany Parish, Louisiana.
What is the population of St. Tammany Parish, Louisiana?
About 272,409 people live in St. Tammany Parish, Louisiana, in 105,070 households of 2.6 people on average. The median age is 40.9, so residents are older than the U.S. median of 37.3 by about 4 years.
Is St. Tammany Parish, Louisiana urban or rural?
Averaged over its land area, St. Tammany Parish, Louisiana has 248 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 2.9 times the U.S. average of 86.
Is St. Tammany Parish, Louisiana an affordable place to live?
The median home costs 2.7 times the median household income ($222,336 against $82,063), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,331 a month takes about 19% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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