Kastro tis Orias (, "Castle of the Fair Maiden") may refer to:
Kastro tis Orias (ballad), a Byzantine ballad and folk story, probably based on the Sack of Amorium.
Various medieval fortresses named for the legend:
Greece Gardiki Castle, Arcadia Kastro tis Orias, Cephalonia Kastro tis Orias, Chios Kastro tis Orias, Kilkis Kastro tis Orias, Kythnos Kastro tis Orias, Lemnos Kastro tis Orias, Mani, Laconia Kastro tis Orias, Servia Kastro tis Orias, Tempe Kastro tis Orias, Thasos Kalavryta Castle, Messenia Ochia Castle, Elis Platamon Castle, Pieria Salmeniko Castle, Achaea Salona Castle, Phocis Siderokastron, Phthiotis
Turkey Demre Castle, (Lycia) Antalya Province Görele Castle, (Pontus) Giresun Province
Albania Terihati castle (Northern Epirus), Gjirokastër county Palaiokastron castle (near Labova e Kryqit) (Northern Epirus), Gjirokastër county