Boreda Abaya was one of the 77 woredas in the Southern Nations, Nationalities, and Peoples' Region of Ethiopia. Part of the Semien Omo Zone, Boreda Abaya was bordered on the south by Arba Minch Zuria, on the southwest by Chencha, on the west by Kucha, on the north by Humbo, and on the east by Lake Abaya which separates it from the Oromia Region. Aruro Island, the largest island in Lake Abaya, was administratively part of this woreda. Towns in Boreda Abaya included Birbir and Zefene.