| Name | Saint Mary Parish |
| State | Louisiana |
| FIPS Code | 22101 |
| County Seat | Franklin |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 54,285 |
| Population Growth Rate(2000-2022) | -9.6% |
| Majority Ethnicity | White 64.03% |
| Public School Majority Ethnicity | African American 42% |
| Partisan Voting Index | Republican:+16 |
| Unemployment Rate (June 2025) | 5.0% |
| Area Code(s) | 337 / 985 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 64.03% |
| African American | 32.78% |
| Hispanic | 1.72% |
| Asian | 1.41% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 0.03% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 39.06% |
| African American | 41.81% |
| Hispanic | 9.87% |
| Asian | 0.83% |
| Native American | 0.83% |
| Hawaiin/Pacific Islander | 0.07% |