Triopas was a demigod and a son of Poseidon.
Triopas was a son of Poseidon and Canace, a daughter of Aeolus. He was from Thessaly. He married Myrmidon's daughter Hiscilla and became father to Iphimedeia, Phorbas and Erysichthon. He destroyed a temple of Demeter in order to obtain materials for roofing his own house, and was punished by insatiable hunger as well as being plagued by a snake which inflicted illness on him. Eventually Demeter placed him and the snake among the stars as the constellation Ophiuchus to remind others of his crime and punishment. A city in Caria was named Triopion after him.