In Roman and Greek mythology, Capys (; ) was a name attributed to three individuals:
- King of Dardania during the Iliad and Aeneid. He was a son of Assaracus and Hieromneme (daughter of Simois), and father of Anchises by his wife Themiste, sister of Laomedon and daughter of Ilus and Eurydice and so grandfather of Aeneas. He, or a different Capys, founded the city of Capua.
- The Trojan who warned not to bring the Trojan horse into the city.
- Mythological king of Alba Longa and descendant of Aeneas. Said to have reigned from 963 to 935 BC.
According to Roman sources, in the Etruscan language the word capys meant "hawk" or "falcon" (or possibly "eagle" or "vulture").
Capys is a genus of butterflies in the family Lycaenidae. The members (species) of this genus are found in the Afrotropic ecozone.