Banja was one of the 105 woredas in the Amhara Region of Ethiopia. It was named after a significant mountain located in the woreda, Mount Banja, where Fasil crushed a revolt of the Agaw in the late 18th century. Part of the Agew Awi Zone, Banja was bordered on the south by Ankesha, on the west by Guangua, on the north by Faggeta Lekoma, and on the east by the Mirab Gojjam Zone. Towns in Banja included Injibara, Kessa, Kosober and Tilili. Other high points included Mount Faddi. Bodies of water in this woreda included the Zengena crater lake.