Ogaden (pronounced and often spelled Ogadēn; Somali: Ogaadeen, Amharic: ውጋዴ/ውጋዴን) is one of the historical names used for the modern Somali Region. It is also natively referred to as Soomaali Galbeed (lit. 'Western Somalia'). The region forms the eastern portion of Ethiopia and borders Somalia.
The Ogaden is a vast plateau located to the south and southeast of the Ethiopian Highlands, and is overwhelmingly inhabited by Somali people. It represents the westernmost region inhabited by the Somalis in the Horn of Africa. It is largely a semi-arid region and encompasses the plains between the border of Somalia and Ethiopia, extending towards the southeastern highlands, where larger cities like Harar and Dire Dawa are located near.