Ogaden (pronounced and often spelled Ogadēn; Somali: Ogaadeen, Amharic: ኦጋዴን?) is the name of a territory comprising the southeastern portion of the Somali Regional State in Ethiopia. The inhabitants are predominantly ethnic Somali and Muslim. The title "Somali Galbeed", which means "Western Somalia," is often preferred by Somali irredentists.
The region, which is around 200,000 square kilometres, borders Djibouti, Kenya, and Somalia. Important towns include Jijiga (Jigjiga), Awbere, Feer Feer, Degehabur, Raaso, (Dhagaxbuur in Somali), Gode (Godey), Kebri Dahar (Qabridahare), Fiq, Shilavo (Shilaabo), Kelafo, Werder (Wardheer), and Denan.
The Ogaden is a plateau, with an elevation above sea level that ranges from 1,500 metres in the northwest, falling to about 300 metres along the southern limits and the Wabi Shebelle valley. The areas with altitudes between 1,400 and 1,600 metres are characterized as semi-arid; receiving as much as 500–600 mm of rainfall annually. More typical of the Ogaden is an average annual rainfall of 350 mm and less. The landscape consists of dense shrubland, bush grassland and bare hills. In more recent years, the Ogaden has suffered from increasingly erratic rainfall patterns, which has led to an increasing frequency of major droughts: in 1984–85; 1994; and most recently in 1999–2000, during which pastoralists claim to have lost 70–90 percent of their cattle.