In Greek mythology, Menoetius referred to several different people.

1. 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".
2. One of Hades' shepherds on Erythea . He told Geryon when Heracles stole Geryon's herd.
3. Father of Patroclus and son of Actor. (Iliad, XI, 765)