St. Tammany Parish, Louisiana

parish in Louisiana, United States of America

St. Tammany Parish (French: Paroisse de Saint-Tammany) is a parish located in the U.S. state of Louisiana, in the New Orleans metropolitan area. The population was 264,570 in 2020, making it the fourth-most populous parish in Louisiana.[1] The parish seat is Covington.[2] The parish was founded in 1810.[3]

St. Tammany Parish
St. Tammany Parish Justice Center
St. Tammany Parish Justice Center
Map of Louisiana highlighting St. Tammany Parish
Location within the U.S. state of Louisiana
Map of the United States highlighting Louisiana
Louisiana's location within the U.S.
Coordinates: 30°24′N 89°58′W / 30.4°N 89.96°W / 30.4; -89.96
Country United States
State Louisiana
FoundedOctober 27, 1810
Named forIndian Chief Tamanend
Largest citySlidell
 • Total1,096 sq mi (2,838 km2)
 • Land845 sq mi (2,189 km2)
 • Water250 sq mi (648 km2)  22.9%
 • Total264,570
 • Density313/sq mi (121/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code985
Congressional district1st


  1. "QuickFacts: St. Tammany Parish, Louisiana".
  2. "Find a County". National Association of Counties. Retrieved 2011-06-07.
  3. "St. Tammany Parish". Center for Cultural and Eco-Tourism. Retrieved September 6, 2014.

Other websites


30°24′N 89°58′W / 30.40°N 89.96°W / 30.40; -89.96