In Greek mythology, Euryanassa (Ancient Greek: Εὐρυάνασσα, lit. 'wide-ruling' or 'of wide queenly sway') is a name that may refer to:
Euryanassa, daughter of the river-god Pactolus. She was the wife of Tantalus, and one of the possible mothers of Pelops, Broteas and Niobe.
Euryanassa, daughter of Hyperphas, leader of the Phlegyans and thus, sister to Euryganeia, wife of Oedipus. She was the mother of Minyas by Poseidon.
Euryanassa, a surname of Hebe