Cleco Power is the only investor-owned electric utility in the state that serves Louisiana exclusively. Cleco has 265,000 customers throughout the state, as far north as Mansfield and as far south as Patterson. Cleco serves 23 of Louisiana's parishes: Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula, Desoto, Evangeline, Grant, Iberia, Jefferson Davis, LaSalle, Natchitoches, Rapides, Red River, Sabine, St. Landry, St. Martin, St. Mary, St. Tammany, Vermillion, Vernon and Washington.

Cleco's service territory is divided into four districts: Northern, Central, Southern and Eastern.