Oromia (spelled Oromiyaa in the Oromo language; ) is one of the nine ethnically based regional states of Ethiopia, covering 284,538 square kilometers. It is bordered by the Somali Region to the east; the Amhara Region, the Afar Region and the Benishangul-Gumuz Region to the north; South Sudan, Gambela Region, and Southern Nations, Nationalities, and Peoples' Region to the west; and Kenya to the south. The 2007 census reported Oromia's population at over 27 million, making it the largest state in population and area. It includes the former Arsi Province along with portions of the former Bale, Hararghe, Illubabor, Kaffa, Shewa, Sidamo, and Welega provinces. Its current capital is Addis Ababa ; other important cities and towns include Adama, Dire Dawa, Harer, Ambo, Asella, Bishoftu, Chiro, Dembidolo, Fiche, Gimbi, Robe, Goba, Dello Buna, Jimma, Metu, Negele Boran, Moyale, Nekemte, Shashamane and Waliso.