Drosia (Greek: Δροσιά, before 1955: Προστοβίτσα - Prostovitsa[2]) is a village and a community in southern Achaea, Greece.

Drosia is located at the foot of the Erymanthos mountains, 6 km east of Stavrodromi, and 37 km south of Patras.

The community includes the villages Kato Drosia, Koumperi and Pteri.

The ancient city Eupagion (Ευπάγιον) was located in the area of present Drosia.

The revolutionary leaders Konstantinos Giannias and Giorgos Giannias, who fought against the Ottoman Empire, were born in Drosia.