PIO´NIA(Πιονία: Eth. Pionita), a town in the interior of Mysia, on the river Satnioeis, to the northwest of Antandrus, and to the north-east of Gargara. (Strab. 13. p. 610.) Under the Roman dominion it belonged to the jurisdiction of Adramyttium (Plin. Nat. 5.32), and in the ecclesiastical notices it appears as a bishopric of the Hellespontine province. (Hierocl. p. 663; Sestini, p. 75.)
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