Abacı is a neighborhood in Bigadiç District, in Balıkesir Province, Türkiye. Abacı lies 0.3 km from the Alaçam Dağları mountains. It has 1,488 inhabitants. The nearest city is Paşa Alanı, 35 km to the northwest. Among the landmarks around are Çamköy Dam (8.1 km), Çaygören Dam (15.7 km) and İkizcetepeler Dam (19.5 km).