St Tammany Louisiana Cities/Towns – Abita Springs, Bush, Covington (Parish Seat), Folsom, Lacombe, Madisonville, Mandeville, Pearl River, Slidell, Sun

St. Tammany Parish (French: Paroisse de Saint-Tammany) is a parish located in the U.S. state of Louisiana. 2016 U.S. Census population: 253,602. The parish seat is Covington.

History
St. Tammany Parish is named after the Delaware Chief Tamanend (c.1628-1698), who made peace with William Penn and was generally renowned for his goodness.