Potamus or Potamos () was the name of several demoi of ancient Attica. They lay on the east coast north of Thoricus, and were once a populous place: they were celebrated as containing the sepulchre of Ion., 7.1.2.Suda, s.v. Ποταμός; Harpocr., s.v. Ποταμός The port of Potamus was probably the one which received the Peloponnesian fleet in 411 BCE.
The demoi were: Potamus Deiradiotes, Potamus Hypenerthen, and Potamus Kathyperthen.
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