In Greek mythology, Amycus (Ἄμυκος) was the son of Poseidon and Melia. He was a boxer and King of the Bebryces, a mythical people in Bithynia. Polydeuces beat him in a boxing match when the Argonauts passed through Bithynia. He was also a prominent Trojan during the Trojan War. He married Theona and had one son named Mimas.