Mermentau is a village located in Acadia Parish, Louisiana. Mermentau has a 2025 population of 490 . Mermentau is currently declining at a rate of -1.21% annually and its population has decreased by -5.59% since the most recent census, which recorded a population of 519 in 2020.
The average household income in Mermentau is $83,657 with a poverty rate of 18.42%. The median age in Mermentau is 68.6 years: 56.9 years for males, and 72.2 years for females. For every 100 females there are 54.5 males.
Data after 2023 is projected based on recent change
The racial composition of Mermentau includes 83.86% White, 10.88% Black or African American, and smaller percentages for and multiracial populations.
White (83.86%)
Black or African American (10.88%)
Two or more races (5.26%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 478 | 83.86% |
| Black or African American | 62 | 10.88% |
| Two or more races | 30 | 5.26% |
Married
Widowed
Divorced
Separated
Never Married
Mermentau's average per capita income is $32,256. Household income levels show a median of $112,864. The poverty rate stands at 18.42%.
Name | Median | Mean |
|---|---|---|
| Married Families | $113,636 | - |
| Families | $113,311 | $95,589 |
| Households | $112,864 | $83,657 |
| Non Families | $36,250 | $31,676 |
Average Income
Median Household Income
Poverty Rate