Polydroso (Greek: Πολύδροσο, before 1957: Βλαχώρι - Vlachori[2]) is a small village in the municipal unit of Paramythia in Thesprotia, Greece.

It is situated on a forested mountainside above the left bank of the river Thyamis, at about 450 m elevation.

The Greek National Road 6 (Igoumenitsa - Ioannina - Larissa) passes east of the village.

Archaeological remains in the surrounding area date as far back as the 4th century BC.

Many of the present residents descend from people who arrived here from the village Sotira in Dropull i Sipërm (Ano Deropoli), Albania around 1800.