Koroivos (Greek: Κόροιβος, before 1955: Κελεβή - Kelevi) is a village in the municipal unit of Gastouni, Elis, Greece. It is situated in a flat rural area, south of the river Pineios. It is 2 km southeast of Lefkochori, 2 km west of Roupaki, 2 km southwest of Agia Mavra and 4 km east of Gastouni.