Osorno is a city and commune in southern Chile. It is the capital of Osorno Province in the Los Lagos Region. It had a population of 145,475 as of the 2002 census. It is 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.