Thibron (Ancient Greek: Θίβρων; died 322 BC)[1] was a Lacedaemonian who was a confidential officer of Harpalus, the Macedonian satrap of Babylon under Alexander the Great.
He then possessed himself of his late master's treasures, fleet, and army, and, ostensibly espousing the cause of some Cyrenaean exiles, sailed to Cyrene with the intention of subjugating it.
He defeated the Cyrenaeans in a battle, obtained possession of their harbour, Apollonia, together with the treasures he found there, and compelled them to capitulate on condition of paying him 500 talents, and supplying him with half of their war-chariots for his expeditions.
Although Thibron was aided by the Barcaeans and Hesperians, and succeeded in taking the town of Taucheira, under the able direction of Mnasicles, the Cyrenaeans recovered Apollonia.
Thibron was forced to flee, but fell into the hands of some Libyans, who delivered him to Epicydes, an Olynthian whom Ophellas, having taken Taucheira, had made governor of the town.