Autolykus (Greek: Αὐτόλυκος) was a Thessalian, son of Deimachus, who together with his brothers Deileon and Phlogius joined Heracles in his expedition against the Amazons. But after having gone astray the two brothers dwelt at Sinope until they joined the expedition of the Argonauts.

Autolycus was subsequently regarded as the founder of Sinope, where he was worshipped as a god and had an oracle. After the conquest of Sinope by the Romans, his statue was carried from there by Lucullus to Rome.

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