For Hermias philosophus, see Hermias (apologist).

Hermias (; Hermeias ek Phoinikes) was a Neoplatonist philosopher who was born in Alexandria c. 410 AD. He went to Athens and studied philosophy under Syrianus. He married Aedesia, who was a relative of Syrianus, and who had originally been betrothed to Proclus, but Proclus broke the engagement off after receiving a divine warning. Hermias brought Syrianus' teachings back to Alexandria, where he lectured in the school of Horapollo, receiving an income from the state. He died c. 450 AD, at a time when his children, Ammonius and Heliodorus, were still small. Aedesia, however, continued to receive an income from the state, in order to raise the children, enabling them to become philosophers.