Formed October 27, 1810 (20th parish)
Saint Tammany Parish (264,575), Covington (11,561), Slidell (28,778)
A well-designed, light brown brick and masonry facility was built in 2003 as the parish courthouse. The courthouse is on East Boston at Columbia and Jefferson, five blocks to the west of United States Highway 190. 1896 and 1959 versions of courthouses were also in Covington however the first parish seat was in Claiborne with an 1818 courthouse. October 27, 1810 was when Saint Tammany Parish was formed as the 20th parish. It was part of the West Florida Territory. Richard C. Lambert & Consultants and Pierce, Goodwin, Alexander & Linville designed the courthouse. Saint Tammany is named after a Delaware Native American chief. The parish seat is named for General William Covington from the War of 1812.
Saint Tammany Parish government consists of a President, a sheriff, a clerk, a treasurer, and a coroner (executive). It has 14 Council Members (legislative.) Twelve District Court Judges serve Saint Tammany and Washington parishes and Nine Justice Court Judges serve Saint Tammany Parish (judicial.) The parish is in the far southeast corner of the state with Mississippi on its eastern border. The Pearl River separates the parish from Mississippi and Lake Pontchartrain lies on the southern border. New Orleans, Louisiana lies across the lake. The parish center is 11.3 miles East-Southeast of Covington nearer Lacombe. The parish is surrounded clockwise by Washington Parish and Mississippi and Saint Barnard, Orleans, Jefferson, and Tangipahoa parishes.
The area of the parish is 1124 square miles. It is 11 out of 64 in the state. It ranks 4 out of 64 in population in the state. It has a density of 235.4 persons per square mile making it 8 out of 64 in the state. Saint Tammany Parish has 23.0% of its population in its incorporated areas. Interstate Highway 10 enters from the east, Mississippi, and exits south, Saint Bernard Parish. Interstate Highway 12 originates in the parish and heads west into Tangipahoa Parish. Interstate Highway 59 comes from Mississippi and terminates at the intersection of Interstate Highways 10 and 12. United States Highway 11 parallels Interstate Highway 59 in from Mississippi then continues on a parallel with Interstate Highway 10 into St. Bernard Parish. United States Highway 90 parallels Interstate Highway 10 from Mississippi into Saint Bernard Parish. United States Highway 190 parallels Interstate Highway 12 first originating in the parish then heading west into Tangipahoa Parish. The parish’s shape is a diamond pointing to the northwest. Covington is in the west part of the parish. Slidell is in the extreme southeast corner of the parish. Covington is the parish seat and Slidell is the largest city. Covington is 4.4% of the parish population while Slidell is 10.9% of the parish population. The parish is pronounced SAENT TAM-MA-NEE. The largest city is pronounced SLIE-DEL. This parish is in the New Orleans-Metairie-Kenner Metropolitan Statistical Area.
Abita Springs
Covington
Folsom
Madisonville
Mandeville
Pearl River
Slidell
Sun