Idaea can mean:
- In Greek mythology, Idaea (Idaia) was a nymph, wife of Scamander and mother of King Teucer. It was also sometimes an epithet of Cybele, referring to Mt. Ida in Asia Minor, a center of her cult.
- Idaea is also the name of her great-granddaughter, the offspring of Bateia (daughter of Teucrus) and Dardanus, and second wife of Phineas