Iraia (Greek: Ηραία) is a former municipality in Arcadia, Peloponnese, Greece.

The region was known in recent times for the construction workers (mastori) who came from the villages of Servos and Lyssarea.

Pausanias describes the ancient cities of Heraia and Melaineai and their buildings.

[4] An excavation near Lyssarea uncovered buildings, mosaics, as well as gold and silver coins.

[citation needed] The municipal unit of Iraia consists of 17 communities:[2] The village of Loutra Iraias is the birthplace of the film-maker Constantinos Gavras (Costa-Gavras).