It is 2 km west of Savalia, 4 km southeast of Gastouni, 3 km northwest of Roviata and 8 km northwest of Amaliada.
The church of the village was built in 1864 and is dedicated to the Annunciation of the Virgin Mary.
Prosilio is one of the Aromanian-speaking villages of Tzoumerka (including Syrrako, Kalarites, Matsouki, Palaiochori and Vathypedo).