In Greek mythology, Menoetius referred to several different people.
- A son of Iapetus and Clymene. A glorious warrior who was insolent to Zeus. By some accounts he was smote by Zeus with a lightning bolt on Mt. Triphyle, and in others he was merely crippled and banished to Tartarus. This Titan's name means "ruined strength".
- One of Hades' shepherds on Erythea. He told Geryon when Heracles stole Geryon's herd.
- Father of Patroclus and son of Actor. (Iliad, XI, 765)