St. Martin Parish, Louisiana

St. Martin Parish, Louisiana, had an estimated population of 51,106 in 2025 across 1,910 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Louisiana's counties and nationally.

Population: 51,106; 2025 estimate
Area: 1,910 km²
Density: 27; per km²
Median income: $55,960; household, ACS 2024
Median age: 40.1; years, ACS 2024

How Louisiana's counties spread

Amenities & Infrastructure

Indicator	Value	In Louisiana	In the US
Households with Broadband2024	83.2%	33 / 64	2,391 / 3,144
Median Gross Rent2024	$870	30 / 64	1,604 / 3,137
Median Home Value2024	$164,200	30 / 64	1,926 / 3,139
Owner-Occupied Homes2024	77.7%	18 / 64	994 / 3,144
Vacant Homes2024	17.8%	29 / 64	1,048 / 3,144

Demography

Indicator	Value	In Louisiana	In the US
Aged 65 and Over2024	17.2%	33 / 64	2,359 / 3,144
American Indian & Alaska Native2024	0.2%	30 / 64	1,145 / 3,144
Asian, non-Hispanic2024	0.8%	25 / 64	1,220 / 3,144
Average Household Size2024people	2.6	11 / 64	589 / 3,144
Black, non-Hispanic2024	28.6%	32 / 64	308 / 3,144
Foreign-Born2024	1.8%	34 / 64	2,102 / 3,144
Hispanic or Latino2024	3.6%	39 / 64	1,976 / 3,144
Median Age2024years	40.1	22 / 64	1,998 / 3,144
Sex Ratio2024per 1,000 males	1,037	28 / 64	701 / 3,144
Speak a Language Other Than English2024	10.6%	3 / 64	861 / 3,144
Under 182024	24.0%	27 / 64	691 / 3,144
Veterans2024	5.4%	37 / 64	2,627 / 3,144
White, non-Hispanic2024	63.1%	24 / 64	2,294 / 3,144

Economy

Indicator	Value	In Louisiana	In the US
Below Poverty Line2024	15.3%	51 / 64	1,133 / 3,144
Households on SNAP2024	20.4%	29 / 64	372 / 3,144
Income Inequality2024index	0.465	41 / 64	902 / 3,144
Median Household Income2024	$55,960	29 / 64	2,407 / 3,143
Per Capita Income2024	$31,041	26 / 64	2,254 / 3,144
Unemployment Rate2024	4.0%	60 / 64	1,816 / 3,144

Education

Indicator	Value	In Louisiana	In the US
Bachelor's Degree or Higher2024	16.8%	34 / 64	2,450 / 3,144
High School or Higher2024	83.2%	38 / 64	2,735 / 3,144

Health Coverage

Indicator	Value	In Louisiana	In the US
No Health Insurance2024	6.1%	47 / 64	2,101 / 3,144
With a Disability2024	16.1%	47 / 64	1,522 / 3,144

Population & Density

Indicator	Value	In Louisiana	In the US
Population2025	51,106	20 / 64	1,001 / 3,144
Population Density2025/km²	27	26 / 64	1,168 / 3,144

Work & Commute

Indicator	Value	In Louisiana	In the US
Commute by Public Transit2024	0.4%	19 / 64	924 / 3,144
Households with No Vehicle2024	9.4%	23 / 64	328 / 3,144
Mean Commute Time2024minutes	27.2	34 / 64	897 / 3,143
Work from Home2024	8.1%	11 / 64	1,731 / 3,144

Other counties of Louisiana

Compare St. Martin Parish against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.