San Juan de la Costa is a commune of Chile, located in the Osorno Province in the Los Lagos Region. The administration (municipalidad) is located at the hamlet of Puaucho, 34 km west of Osorno. San Juan de la Costa is known for its large population of indigenous Huilliches. This commune is characterized by a large coastline suitable for ecotourism, especially balnearios Pucatrihue and Maicolpue, the port of Bahía Mansa, and the ethnic tourism of the Huilliche culture.