The Blemmyes (Latin Blemmyae) are a nomadic Beja tribal kingdom that exists from at least 600 BCE to the third century CE in Nubia.

They are described in Roman histories of the later empire, with the Emperor Diocletian enlisting Nobatae mercenaries from the Western Desert oases to safeguard Aswan, the empire's southern frontier, from raids by the Blemmyes.

They also become fictionalized as a legendary race of acephalous (headless) monsters who have eyes and mouths on their chest.