Osorno (Mapuche: Chauracavi) city and commune in southern Chile and capital of Osorno Province in the Los Lagos Region. It had a population of 145,475, as of the 2002 census. It is located south of the national capital of Santiago, north of the regional capital of Puerto Montt and west of the Argentine city of San Carlos de Bariloche, connected via International Route 215 through the Cardenal Antonio Samoré Pass. It is a gateway for land access to the remote southern regions of Aysén and Magallanes, which would otherwise be accessible only by sea from the rest of the country.