In Greek mythology, Idaea or Idaia (Ancient Greek: Ἰδαία, 'she who comes from Ida' or 'she who lives on Ida') was a nymph, presumably of Mount Ida in the ancient Troad region of western Anatolia (in modern-day Turkey). She was the mother, by the river-god Scamander, of Teucer, who was the first to rule as a king over the region known later as Troy.