Simplify the following text for a Grade 9 native English-speaking person.
Original: St. Tammany Parish is a parish located in the U.S. state of Louisiana , in the New Orleansâ `` Metairieâ `` Kenner Metropolitan Statistical Area .
Simplified: 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 .