Aristion (Greek: Άριστίων; died 1 March 86 BC in Athens) was a philosopher who became tyrant of Athens from c. 88 BC until he died in 86 BC. Aristion joined forces with King Mithridates VI of Pontus against Greece's overlords, the Romans, fighting alongside Pontic forces during the First Mithridatic War, but to no avail. On 1 March 86 BC, after a long and destructive siege, Athens was taken by the Roman general Lucius Cornelius Sulla, who had Aristion executed.