Orithyia or Oreithyia was an Attic princess, the daughter of Erechtheus and Praxithea. She was abducted by Boreas (the north wind) and carried to Thrace, where he forcibly married her. Her name means 'mountain rusher', 'she who rages on the hills', from oros, 'mountain' and thyo, 'to rush', 'storm', 'rage'.

This suggests that she was a priestess or at least a devotee of Bacchus, like her aunts Procne and Philomela. It is also significant that the children of Orithyia and Boreas had 'windy' (or 'rushing') names: Calais, Chione and Zetes.