Lebeau (also spelled LeBeau and originally known as Bayou Petite Prairie) is an unincorporated community and census designated place (CDP) in St. Landry Parish, Louisiana, United States, in the central part of the state. Nearby communities include Palmetto, Ville Platte and Washington. The community is part of the Opelousas–Eunice Micropolitan Statistical Area. It is located at the intersection of U.S. Route 71 and Louisiana Highway 10.