The Ogaden (Somali: Ogaadeen, Arabic: أوغادين) is a Somali clan, and one of the largest Darod subclans.
Members of the Ogaden clan primarily live in the central Ogaden plateau of Ethiopia (Somali Region), the North Eastern Province of Kenya, and the Jubaland region of Southern Somalia. They also inhabit Somalia's major cities such as Mogadishu and Kismayo.
According to Human Rights Watch, the Ogaden is the largest Darod clan in Ethiopia's Somali Region, and may account for 40 to 50 percent of the Somali population in Ethiopia. The Ogaden clan "constitutes the backbone of the ONLF". In particular, the ONLF operates in Ogaden areas
There is no clear agreement on the clan and sub-clan structures and many lineages are omitted. The following listing is taken from the World Bank's Conflict in Somalia: Drivers and Dynamics from 2005 and the United Kingdom's Home Office publication, Somalia Assessment 2001.
Ogaden (pronounced and often spelled Ogadēn; Somali: Ogaadeen, Amharic: ኦጋዴን?) is the territory comprising the southeastern portion of the Somali Regional State in eastern Ethiopia. The inhabitants are predominantly ethnic Somali and Muslim. The title "Somali Galbeed", which means "Western Somalia," is often preferred by Somalis.
The region, which is around 200,000 square kilometres, borders Djibouti, Somalia, and Kenya. Important towns include Jijiga (Jigjiga), Awbere, Ferfer, Degehabur (Dhagaxbuur in Somali), Raaso, 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.