Agios Dimitrios (Greek: Άγιος Δημήτριος) is a former municipality in the Ioannina regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Dodoni, of which it is a municipal unit. Population 4,566 (2011), its area is 231.473 km². The seat of the municipality was in Theriakisi. The largest village is Kato Mousiotitsa which has a school, gymnasium and lyceum. The municipal unit covers the northwestern part of the Xerovouni mountains.