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St. Tammany Parish Population

All St. Tammany Parish population data above are from the US Census Bureau.

St. Tammany Parish Demographics Summary

Population

With 253,602 people, St. Tammany Parish is the 4th most populated county in the state of Louisiana out of 64 counties. But watch out, St. Tammany Parish, because Caddo Parish with 248,851 people and Lafayette Parish with 241,398 people are right behind you.

Race & Ethnicity

The largest St. Tammany Parish racial/ethnic groups are White (79.5%) followed by Black (11.7%) and Hispanic (5.2%).

Median Income

In 2015, the median household income of St. Tammany Parish residents was $62,137. St. Tammany Parish households made slightly more than Livingston Parish households ($58,251) and St. Charles Parish households ($59,990) . However, 11.4% of St. Tammany Parish residents live in poverty.

Median Age

The median age for St. Tammany Parish residents is 39.8 years young.

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The population data for St. Tammany Parish are from the Census 2000, Census 2010, the Census' American Community Survey 2015 5-year estimates and the Census' 2016 Population Estimates. The demographic data for Caddo Parish, Lafayette Parish, Livingston Parish, and St. Charles Parish are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2015 5-year estimates, and were downloaded on December 2016. Check out our FAQ section for more details.