St. Martin Parish, Louisiana Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
St. Martin 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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C
Health Below average
-
C
Income Below averageWealthier than 70% of counties in Louisiana
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F
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Population | 51,353 | 4,610,276 | 337,468,954 |
| Population density (per sq mi) | 62.9 | 88.0 | 86.4 |
| Population growth (%/yr) | -0.49% | -0.10% | 0.59% |
| Median age | 40.1 | 35.9 | 37.3 |
| Households | 19,579 | 1,803,262 | 130,235,071 |
Population in St. Martin Parish declined by 0.2% from 2009 to 2024, reaching 51,353 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in St. Martin Parish is Gen X, aged 45–60, at 21.1% of residents. That is 1.7 points above Louisiana as a whole.
- Gen Z 13–28 10,626 20.7% -0.8 pts
- Millennials 29–44 10,601 20.6% -1.2 pts
- Gen X 45–60 10,821 21.1% +1.7 pts
- Boomers 61–79 8,750 17.0% -0.1 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. Martin 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. Martin Parish
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
St. Martin Parish has a the economy index of C, which means it is somewhat prosperous.
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Median household income | $56,973 | $60,934 | $80,455 |
| Income growth (%/yr) | 2.79% | 3.69% | 4.80% |
| Unemployment rate | 4.0% | 6.2% | 5.2% |
The median household income in St. Martin Parish is about 7% lower than in Louisiana.
Housing
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Median home price | $72,210 | $170,446 | $248,835 |
| Median rent | $869 | $1,063 | $1,407 |
| Homeownership rate | 77.7% | 67.4% | 65.2% |
The median home price in St. Martin Parish is about 6.9 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $869 per month for that long.
Commute Time & Mobility
Commuters in St. Martin Parish spend about 47 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 196 hours, about 8.2 full days, spent commuting.
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.5 | 21.3 | 22.4 |
| Round-trip commute (min) | 47.0 | 42.5 | 44.8 |
| Yearly time spent (hours) | 196 | 177 | 187 |
| Estimated yearly cost | $6,066 | $5,493 | $5,790 |
| Work from home | 8.1% | 8.1% | 15.0% |
| Highway traffic (vehicles/day) | 9,038 | 8,275 | 8,813 |
| Local road traffic (vehicles/day) | 1,497 | 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. Martin Parish is 23 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. Martin Parish has a education index of F, which means it scores poorly in education.
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 13.2% | 24.0% | 31.6% |
| Average household size | 2.61 | 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. Martin Parish has a health index of C, which means it is somewhat healthy.
| Metric | St. Martin Parish | Louisiana Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 75.5 | 75.1 | 78.3 |
| Self-rated poor health | 20.6% | 22.3% | 16.3% |
| Smokers | 23.8% | 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. Martin Parish, LA Compared With Nearby Counties
St. Martin Parish, LA is typical in size for this group, 51,353 residents against a local median of 47,828, so the measures below are close to a like for like comparison. The measure that sets St. Martin Parish, LA apart most is median home price: $72,210, 53% below the local median of $154,658.
Commute tells the same story from another angle: 23.5 min against a local median of 18.7 min, 26% above it. The one measure here that carries a verdict is commute, and at 26% above the local median it puts St. Martin Parish, LA at the weaker end of the local range. The counties themselves spread $122,621 on median home price, so St. Martin Parish, LA sits at one end of an already wide local range rather than apart from it. St. Martin Parish, LA has the 6th highest median home price of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| St. Martin Parish, LA | 51,353 | $56,973 #3/6 | $72,210 #6/6 | 23.5 min #6/6 |
| Iberville Parish, LA | 29,819 | $55,441 | $137,826 | 18.1 min |
| Iberia Parish, LA | 68,630 | $56,492 | $154,658 | 20.6 min |
| West Baton Rouge Parish, LA | 27,974 | $86,048 | $118,592 | 21.7 min |
| Lafayette Parish, LA | 247,982 | $67,829 | $241,213 | 18.7 min |
| St. Mary Parish, LA | 47,828 | $53,303 | $213,709 | 15.5 min |
Frequently Asked Questions
Common questions about St. Martin Parish, Louisiana.
How big is St. Martin Parish, Louisiana by population?
About 51,353 people live in St. Martin Parish, Louisiana, in 19,579 households of 2.6 people on average. The median age is 40.1, so residents are older than the U.S. median of 37.3 by about 3 years.
How densely populated is St. Martin Parish, Louisiana?
Averaged over its land area, St. Martin Parish, Louisiana has 63 people per square mile, a density typical of rural areas. That is close to the U.S. average of 86.
How affordable is housing in St. Martin Parish, Louisiana?
The median home costs 1.3 times the median household income ($72,210 against $56,973), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $869 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in St. Martin Parish, Louisiana?
Unemployment in St. Martin Parish, Louisiana is only 4.0%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in St. Martin Parish, Louisiana?
13.2% of adults in St. Martin Parish, Louisiana hold a bachelor's degree or higher (about 1 in 8), well below the U.S. share of 31.6%.
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