St. Tammany Parish's estimated 2026 population is 281,243 with a growth rate of 0.65% 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 19.9% since that time.
Data after 2023 is projected based on recent change
The racial composition of St. Tammany Parish includes 74.96% White, 12.22% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (74.96%)
Black or African American (12.22%)
Two or more races (8.84%)
Other race (1.6%)
Asian (1.3%)
Native American (0.75%)
Native Hawaiian or Pacific Islander (0.33%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 201,888 | 74.96% |
| Black or African American | 32,914 | 12.22% |
| Two or more races | 23,803 | 8.84% |
| Other race | 4,297 | 1.6% |
| Asian | 3,514 | 1.3% |
| Native American | 2,016 | 0.75% |
| Native Hawaiian or Pacific Islander | 899 | 0.33% |
Married
Widowed
Divorced
Separated
Never Married
St. Tammany Parish's average per capita income is $52,622. Household income levels show a median of $79,277. The poverty rate stands at 12.18%.
Name | Median | Mean |
|---|---|---|
| Married Families | $111,372 | $142,480 |
| Families | $93,950 | $123,243 |
| Households | $79,277 | $106,854 |
| Non Families | $45,391 | $61,415 |
Average Income
Median Household Income
Poverty Rate