Kastro tis Orias (Greek: Κάστρο της Ωριάς/Οριάς, "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