In Greek mythology, Idas (Ancient greek: Ἴδας, Ídas) was a son of Aphareus and Arene and brother of Lynceus. He and Lynceus loved Hilaeira and Phoebe and fought with their rival suitors, Castor and Pollux, killing the mortal brother Castor. He later fell in love with Marpessa, who Apollo also wooed. Marpessa chose Idas because she feared Apollo would abandon her in her old age.

Community content is available under CC-BY-SA unless otherwise noted.