St. Tammany Parish's 2026 population is estimated at 281,243, reflecting a 0.65% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Tammany Parish is the 4th largest parish in Louisiana. The 2010 population was 234,564 and has grown 19.9% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.5 years
Female: 41.7 years
Male: 39.4 years
There are 208,124 adults, (50,238 of whom are seniors) in St. Tammany Parish.
Female: 139,106 (51.1%)
Male: 133,315 (48.9%)
The racial composition of St. Tammany Parish includes 73.83% White, 12.23% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 201,130 | 73.83% |
| Black or African American | 33,305 | 12.23% |
| Two or more races | 26,515 | 9.73% |
| Other race | 4,729 | 1.74% |
| Asian | 3,711 | 1.36% |
| Native American | 2,079 | 0.76% |
| Native Hawaiian or Pacific Islander | 952 | 0.35% |
St. Tammany Parish 's average per capita income is $54,190. Household income levels show a median of $81,202. The poverty rate stands at 11.4%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $115,890 | $147,635 |
| Families | $96,466 | $127,467 |
| Households | $81,202 | $109,896 |
| Non Families | $45,342 | $61,988 |
Average Income
Median Household Income
Poverty Rate