Alexander II Zabinas (Greek Ἀλέξανδρoς Zαβίνας), ruler of the Greek Seleucid kingdom, was a counter-king who emerged in the chaos following the Seleucidian loss of Mesopotamia to the Parthians. Zabinas was a false Seleucid who claimed to be an adoptive son of Antiochus VII Sidetes, but in fact seems to have been the son of an Egyptian merchant named Protarchus. Antioch, Apamea, and several other cities, disgusted with the tyranny of Demetrius, acknowledged the authority of Alexander. He was used as a pawn by the Egyptian king Ptolemy VIII Physcon, who introduced Zabinas as a means of getting to the legitimate Seleucid king Demetrius II, who supported his sister Cleopatra II against him in the complicated dynastic feuds of the latter Hellenistic dynasties.
Zabinas managed to defeat Demetrius II, who fled to Tyre and was killed there, and thereafter ruled parts of Syria (128 BC–123 BC), but soon ran out of Egyptian support and was in his turn was defeated by Demetrius' son Antiochus VIII Grypus.
Zabinas fled to the Seleucid capital Antiochia, where he plundered several temples. He is said to have joked about melting down a statuette of the goddess of victory Nike which was held in the hand of a Zeus statue, saying "Zeus has given me Victory". Enraged by his impiety the Antiochenes cast Zabinas out of the city. He soon fell into the hands of robbers, who delivered him up to Antiochus, by whom he was put to death, in 122 BC.
The name "Zabinas" means "the purchased slave", and was applied to him, deprecatingly, in response to a report that he had been bought by Ptolemy as a slave. For reasons unknown, Alexander II was the only late Seleucid not to use epithets on his coins. Several of his coins are extant.