Major General Sir Nils Olav III, Baron of the Bouvet Islands is a king penguin who resides in Edinburgh Zoo, Scotland. He is the mascot and colonel-in-chief of the Norwegian King's Guard. The name 'Nils Olav' and associated ranks have been passed down through three king penguins since 1972, the current holder being Nils Olav III.

Bouvet Island is an island and dependency of Norway, and declared an uninhabited protected nature reserve. It is a subantarctic volcanic island, situated in the South Atlantic Ocean at the southern end of the Mid-Atlantic Ridge, and is the world's most remote island. It is not part of the southern region covered by the Antarctic Treaty System.