Yaso is one of the 20 Districts of Ethiopia, or woredas, in the Benishangul-Gumuz region of Ethiopia. Part of the Kamashi Zone, Yaso is bordered by the Abay River on the north which separates it from the Metekel Zone and the Amhara Region, by the Oromia Region in the southeast, by the Hanger River on the south which separates it from Belo Jegonfoy, and by the Didessa River on the west which separates it from Kamashi and Agalo Mite.