This dolphin is found only along the Chilean coast (and possibly in southern Argentina), from about 30°S to Cape Horn, at the southern tip of South America. As is true of other members of the genus, it is found in shallow coastal waters, and sometimes enters estuaries and rivers. It occurs in the channels and fjords of southern Chile, and to a lesser extent along the west coast of Tierra del Fuego, such as in the Strait of Magellan. Its distribution appears to be continuous, although there may be areas of local abundance, such as Golfo de Arauco, the coast off Valdivia and the eastern side of Isla de Grande Chiloé (Goodall et al. 1988).