Anaphlystus or Anaphlystos was a coastal (paralia) deme of ancient Athens, belonging to the Antiochis phyle, on the west coast of Attica, opposite the island of Eleussa, and a little north of the promontory of Sunium, between that promontory and that of Astypalaea. It bordered on Aegilia to the west, to Atene in the south-east and to Amphitrope to the east. To the northwest, it was separated from Phrearrhioi by the Astike Hodos.