Almirantazgo Fjord (Spanish: Fiordo Almirantazgo), also known as Almirantazgo Sound (Spanish: Seno Almirantazgo) or Admiralty Sound, is a Chilean fjord located in the far south of the country at (54°19′S69°30′W). The fjord cuts deeply into the west coast of the Isla Grande de Tierra del Fuego, extending southeastwards from the Whiteside Channel, which separates Isla Grande from Dawson Island. On its south side several smaller fjords and bays make significant indentations into the north coastline of the Cordillera Darwin. One of these, Ainsworth Bay, is home to a colony of elephant seals.