Orithyia, "woman raging in the mountains", was the daughter of Marpesia. Upon the death of her mother, she became the new queen of the Amazons. She co-ruled with Antiope. She was famous for her perpetual virginity. Her war techniques were outstanding and brought much honor to the Amazon empire.
She led the Attic War to free Hippolyte and take revenge for the defeat of Antiope. The Amazons were eventually defeated, but managed to escape to their allies.
Orithyia's successor was Penthesilea.