St. Tammany Parish, Louisiana Demographics 2026

Population Overview

St. Tammany Parish is located in Louisiana with a total population of 269,331. It is the 4th most populous county out of 64 in Louisiana.

Age Demographics

The median age in St. Tammany Parish is 40.4 years. This is 7% higher than the state median of 37.8 years.

Economy, Income & Housing

The median household income in St. Tammany Parish is $79,277. This is 32% higher than the state median of $60,023. Compared to the national median of $78,538, household income here is about average. The poverty rate stands at 12.2%. This is 35% lower than the state poverty rate of 18.9%. The unemployment rate is 4.8%. This is 24% lower than the state rate of 6.3%. The median home value is $272,200. Housing costs are 30% higher than the state median of $208,700. The home-value-to-income ratio is 3.4x. 78.8% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 67.3%.

Race & Ethnicity

The largest racial or ethnic group in St. Tammany Parish is White (non-Hispanic), making up 73.3% of the population. Black or African American residents account for 12.0%. The Black or African American population (12.0%) is well below the state average of 30.8%.

Education

36.6% of residents aged 25 and older hold a bachelor's degree or higher. This places St. Tammany Parish in the top 10% of all cities in the state for educational attainment. This is 38% higher than the state rate of 26.6%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.4%.