Istrouma Area Council serves Scouts in both Louisiana and Mississippi, primarily in the Greater Baton Rouge Area and Florida Parishes. Specifically, the council includes Scouts from the following parishes: Ascension, East Baton Rouge, West Baton Rouge, East Feliciana, West Feliciana, Iberville, Pointe Coupee, St. Helena, St. James, St. Tammany, Washington, and Tangipahoa. Wilkinson County is the sole Mississippi county in the council.