In Greek mythology, Phthia (/ˈθaɪə/; Greek: Φθία or Φθίη Phthía) may refer to the following individuals: * Phthia, daughter of Phoroneus and mother of Achaeus by the god Zeus. This version is to some extent confirmed by Aelian, who relates that Zeus assumed the shape of a dove to seduce a certain Phthia. * Phthia, the beloved of Apollo, by whom she became the mother of Dorus, Laodocus, and Polypoetes. * Phthia, a Theban princess who was one of the Niobids, children of Amphion, king of Thebes, and Niobe, daughter of Tantalus. * Phthia or Clytia, the concubine of Amyntor who falsely accused her stepson, Phoenix, of seduction causing his father to blind him.