Frosyni is a village in Souli Municipality, in the regional unit of Thesprotia, in the region of Epirus, Greece. Frosyni lies 7.9 km from the Thesprotika Ori mountains. It has 75 inhabitants (2021). The nearest city is Ioannina, 32 km to the northeast. Among the landmarks around are Dodona (19.3 km), Necromanteion of Acheron (25 km) and Ioannina Castle (33 km). Among the natural features are Balta of Striga (15.8 km).
Also written Φροσύνη.