Dega is one of the woredas in the Oromia Region of Ethiopia. Part of the Illubabor Zone, Dega is bordered on the south by Chora, on the west by Supena Sodo, on the north by the Mirab Welega Zone, on the northeast by the southern exclave of the Benishangul-Gumuz Region, and on the east by Bedele. Towns in Dega include Dega and Mako. Mako woreda was part of Dega woreda.