Cleon (/ˈkliːɒn, -ən/; Greek: Κλέων Kleon, Ancient Greek: [kléɔːn]) was a tyrant of the ancient Greek city-state of Sicyon.^[1] According to Plutarch, he was assassinated and Timocleidas and Cleinias were made chief magistrates.^[2] According to Pausanias, Cleon was succeeded by Euthydemus and Timocleidas who ruled jointly as tyrants.^[1]