Hermeias (/hɜːrˈməs/) or Hermias (/ˈhɜːrmiəs/; Greek: Ἑρμείας or Ἑρμίας; died 220 BC) was a Carian by birth, who had raised himself to be the favourite and chief minister of Seleucus III Ceraunus (225223 BC), and was left at the head of affairs in Syria by that monarch when he set out on the expedition across the Taurus Mountains, in the course of which Seleucus met with his death, 223 BC.