Hermus or Hermos (Ancient Greek: Ἕρμος) was a deme of ancient Attica. It lay on the sacred road to Eleusis, between the Cephissus and the Pythium, a temple of Apollo on Mount Poecilum, upon a rivulet of the same name. Here was the splendid monument of Pythonice, the wife of Harpalus.
The site of Hermus is tentatively identified with Chaidari.
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Acamantis (Greek: Ακαμαντίς, romanized: Akamantis) was one of the phylai (tribes) of classical Athens, created during the reforms of Cleisthenes. It was named after the legendary hero Acamas, and included the demes of Cholargos,Eiresidai,Hermos,Iphistiadai,Kerameis,Kephale,Poros,Thorikos,Eitea,Hagnous,Kikynna,Prospalta andSphettos.
Pericles was a member of this tribe.