St. Martin Parish, Louisiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 21st-largest in Louisiana
The population of St. Martin Parish, Louisiana is 51,559 as of the 2023 American Community Survey, making it the 21st-largest county in Louisiana. The median household income is $53,394, the median home value is $151,000, and the median age is 39.7.
The population of St. Martin Parish has declined 2.0% since 2010 (52,263 → 51,218), a -0.14% annualized rate.
51,559
Population
-0.14%
Annual growth
70
People / sq mi
$53,394
Median Income
$151,000
Median Home Value
St. Martin Parish covers 738 sq mi of land at 69.9 people per square mile.
About St. Martin Parish, LA
St. Martin Parish is a county in Louisiana with a population of 51,559. It ranks #21 among counties in Louisiana by population. The median age is 39.7, in line with the national median. The population is 49.1% male and 50.9% female.
The median household income in St. Martin Parish is $53,394, below the US median of $74,580. 11.4% of residents live below the federal poverty level. Home values sit at a median of $151,000, with monthly rent averaging $865. The homeownership rate of 78.9% is higher than the national rate of 64.8%.
Educational attainment in St. Martin Parish reflects 15.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 6.3% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 28.0 minutes each way.
St. Martin Parish Population History (2010-2024)
The county of St. Martin Parish had a population of 52,263 in 2010 and 51,218 in 2024, a -2.0% growth over 14 years. The peak was 54,125 in 2017. Average annual growth rate: -0.14%.
51,218
Population (2024)
52,263
Population (2010)
54,125
Peak (2017)
-0.14%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 52,263 |
| 2011 | 52,804 |
| 2012 | 52,664 |
| 2013 | 52,950 |
| 2014 | 53,309 |
| 2015 | 53,891 |
| 2016 | 53,829 |
| 2017 | 54,125 |
| 2018 | 53,629 |
| 2019 | 53,497 |
| 2020 | 51,614 |
| 2021 | 51,550 |
| 2022 | 51,260 |
| 2023 | 51,122 |
| 2024 | 51,218 |
Race & Ethnicity
| White | 64.8% |
| Black or African American | 28.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
39.7
Median Age
50.9%
Female
49.1%
Male
16.6%
Age 65+
Age Distribution
Children (under 15): 20.0% · Seniors (65+): 16.6%
Income & Poverty
| Median household income | $53,394$-6,629 vs state |
| Mean household income | $74,226 |
| Per-capita income | $29,983 |
| Poverty rate | 11.4%-2.8% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 55.8% |
Top Industries by Employment
The largest employment sector in St. Martin Parish is professional & business services, accounting for 19.7% of workers.
How residents commute
0.2%
Drive alone
1.2%
Carpool
84.8%
Public transit
6.3%
Work from home
28.0 min
Avg commute
Housing
$151,000$-57,700 vs state
Median home value
$865
Median rent
78.9%
Homeownership rate
23,704
Total housing units
84.2%
Occupied
15.8%
Vacant
21.1%
Renter-occupied
Social & access
93.3%
With health insurance
87.1%
With broadband internet
7.9%
Foreign-born
5.9%
Veterans (18+)
16.9%
With a disability
88.8%
Speak language other than English at home
Education
82.9%
High School+
15.3%
Bachelor's+
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Frequently Asked Questions
St. Martin Parish, Louisiana has a population of 51,559 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 21st-largest county in Louisiana. Population density is 70 people per square mile.
The population of St. Martin Parish has declined 2.0% since 2010 (52,263 → 51,218), a -0.14% annualized rate.
The median household income in St. Martin Parish, Louisiana is $53,394, with mean (average) household income of $74,226 and per-capita income of $29,983. 11.4% of residents live below the federal poverty level.
In St. Martin Parish, the largest racial and ethnic groups are White (64.8%), Black or African American (28.6%), Hispanic or Latino (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in St. Martin Parish, Louisiana is 39.7 years. Residents are 50.9% female and 49.1% male.
The median home value in St. Martin Parish is $151,000 and median monthly rent is $865. 78.9% of occupied housing units are owner-occupied. The county has 23,704 total housing units, 15.8% of which are vacant.
The largest employment sector in St. Martin Parish, Louisiana is professional, scientific, and management services, employing 19.7% of workers. The unemployment rate is 3.0%.
New Orleans is among the largest cities associated with St. Martin Parish, Louisiana, with a population of 376,035.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.