The daily La Tercera said the penguins were found dead at Caleta Queule, 800 km south of Santiago and more than 2,000 km north of Antarctica, on Saturday. The cause of the deaths is not yet known.
Local officials said there are no signs that the penguins suffered poisoning. Several carcasses have been sent to a university in Valdivia, in southern Chile, for testing.
Penguins usually migrate from Antarctica to Chile and Peru during the southern hemisphere winter, which begins around June.