Welega (Amharic: ወለጋ, wälläga); also Wol-arga was a province in the western part of Ethiopia, with its capital city at Nekemte. It was named for the Wollega Oromo, who are the majority of the population within its boundaries.
Following the liberation of Ethiopia in 1941, the following provinces were added to Welega to simplify administration: the semi-autonomous areas of Asosa, Beni Shangul, Leqa Naqamte, and Leqa Qellam, and the province of Sibu.
The boundaries of Welega remained unchanged until the adoption of new constitution in 1995, when Welega was divided, with part of its territory becoming the Asosa and Kamashi Zones of the Benishangul-Gumuz Region, and the rest becoming part of the Mirab Welega, Misraq Welega and Illubabor Zones of the Oromia Region.
- Paul B. Henze, Layers of Time (New York: Palgrave, 2000), pp. 237f.