In Greek mythology, Diocles (Ancient Greek: Διοκλῆς Dioklēs) may refer to:
Diocles of Pherae, son of Orsilochus, father of the twins Orsilochus and Crethon, and also of Anticleia, the mother of Nicomachus and Gorgasus by Machaon. In the Odyssey, Telemachus and Peisistratus spent a night at his house on their way to Sparta, as well as on their way back.
Diocles the king, one of the first priests of Demeter, and one of the first to learn the secrets of the Eleusinian Mysteries, along with Triptolemus and Polyxenus.
Diocles of Megara, to where he fled from Athens. He was known for his love of boys, and was killed in a battle as he was covering his loved one with his own shield. The people of Megara buried Diocles and honored him as a hero, and held a kissing contest dedicated to him.
Diocles, king of Megara, who was overthrown by Theseus, as a result of which Eleusis was annexed from Megara. He may be identical with #2 or #3.
