St. Tammany Parish's estimated 2026 population is 280,551 with a growth rate of 0.52% in the past year according to the most recent United States census data. St. Tammany Parish is the 4th largest parish in Louisiana. The 2010 population was 234,564 and has seen a growth of 19.61% since that time.
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