| status = DD
|| status_system = IUCN3.1
|| status_ref =
|| image = Killerwhales jumping.jpg
|| image_alt = Two killer whales jump above the sea surface, showing their black, white and grey colouration. The closer whale is upright and viewed from the side, while the other whale is arching backward to display its underside.
|| image_caption = Transient killer whales near Unimak Island, eastern Aleutian Islands, Alaska
|| image2 = Orca size-2.svg
|| image2_alt = Diagram showing a killer whale and scuba diver from the side: The whale is about four times longer than a human, who is roughly as long as the whale's dorsal fin.
|| image2_caption = Size compared to an average human
|| genus = Orcinus
|| parent_authority = Fitzinger, 1860
|| species = orca
|| authority = (Linnaeus, 1758)
|| synonyms = Orca gladiator
|| range_map = Cypron-Range Orcinus orca.svg
|| range_map_alt = A world map shows killer whales are found throughout every ocean, except parts of the Arctic. They are also absent from the Black and Baltic Seas.
|| range_map_caption = Orcinus orca range (in blue)|