In Greek mythology, Lycus referred to several people.
- Son of Poseidon and Celaeno
- Son of Dascylus of Mysia. He was hospitable towards the Argonauts and Heracles, who conquered the land of the Bebryces (Heraclea).
- An alternate spelling of Lykos
- Son of Hyrieus. He became the guardian of Labdacus and Laius.
- Brother of Nycteus in Greek mythology, Lycus was brother-in-law to Antiope whom Zeus impregnated. She fled in shame to King Epopeus of Sicyon and abandoned her children, Amphion and Zethus. They were exposed on Mount Cithaeron, but were found and brought up by a
