Koumanis (Greek: Κούμανης, also Κούμανι - Koumani) is a mountain village and a community in the municipal unit of Foloi, Elis, Greece.

The community includes the small villages Ai Giannakis and Kastania.

Koumanis is located at 650 m above sea level, at the northern edge of the Foloi oak forest.

The small rivers Gkoura and Koumaneiko form deep ravines near Koumanis.

The inhabitants of Koumanis and the neighbouring village Antroni were known for their bravery during the Greek War of Independence.