Mecidiye is a neighborhood in Bigadiç District, in Balıkesir Province, Türkiye. Mecidiye lies 2.5 km from the Anatolian plateau mountains. It has 790 inhabitants (2022). The nearest city is Balıkesir, 24 km to the northwest. Among the landmarks around are İkizcetepeler Dam (7.9 km), Zagan Pasha Mosque (24 km) and Çamköy Dam (12.5 km).