St. Martin Parish's 2026 population is estimated at 50,911, reflecting a -0.38% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Martin Parish is the 20th largest parish in Louisiana. The 2010 population was 52,263 and has grown -2.59% since 2010.
Overall: 40.1 years
Female: 40.5 years
Male: 39.6 years
There are 39,017 adults, (8,834 of whom are seniors) in St. Martin Parish.
Female: 26,147 (50.9%)
Male: 25,206 (49.1%)
The racial composition of St. Martin Parish includes 63.41% White, 28.61% Black or African American, and smaller percentages for Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 32,564 | 63.41% |
| Black or African American | 14,690 | 28.61% |
| Two or more races | 3,178 | 6.19% |
| Asian | 390 | 0.76% |
| Other race | 390 | 0.76% |
| Native American | 93 | 0.18% |
| Native Hawaiian or Pacific Islander | 48 | 0.09% |
St. Martin Parish 's average per capita income is $46,046. Household income levels show a median of $55,960. The poverty rate stands at 15.26%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $91,809 | $111,852 |
| Families | $74,023 | $94,354 |
| Households | $55,960 | $77,235 |
| Non Families | $28,111 | $39,397 |
Average Income
Median Household Income
Poverty Rate