Teuku Jacob (6 December 1929 – 17 October 2007) was an Indonesian paleoanthropologist.
As a student of Gustav Heinrich Ralph von Koenigswald in the 1950s, Jacob claimed to have discovered and studied numerous specimens of Homo erectus.
He came to international prominence as a vocal critic of scientists who believed remains discovered in Flores belonged to a new species in the genus Homo, Homo floresiensis.