Nicanor (; Greek, Modern (1453-);: Nικάνωρ Nīkā́nōr) was a Syrian Greek who lived in the 3rd century BC under Seleucid Empire.
Together with a Gaul named Apaturius, he assassinated Seleucus III Ceraunus during his expedition into Asia against Attalus I in 222 BC. He was immediately seized and executed by order of the general Achaeus.