Oromia is one of the nine ethnically based regional states of Ethiopia, covering 286,612 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 2011 census reported Oromia Region population is 42,000,000; making it the largest state in population.
Oromia includes the former Arsi Province along with portions of the former Bale, Hararghe, Illubabor, Kaffa, Shewa, Sidamo, (town)|Chiro]], Dembidolo, Begi, Fiche, Gimbi, Robe, Goba, Dello Buna, Jimma, Metu, Negele Boran, Moyale, Nekemte, Shashamane,Mendi, Ethiopia ,Haramaaya and Waliso,Shambuu,Nejo,Burayyuu, Sabbata,Gutin,Gida Ayana,Haro,Batu
Before 2000, the regional capital of Oromia was Finfinne, also known as "Addis Ababa" (in the Oromo language). The relocation of the regional capital to Finfinne sparked considerable controversy, and this forced the government to bring back the capital to Finfinne. Critics of the move believed the Ethiopian government wished to de-emphasize 's location within Oromia. On the other hand, the government maintained that Finfinne "has been found inconvenient from the point of view of developing the language, culture and history of the Oromo people."
On 10 June 2005, the Oromo People's Democratic Organization, part of the ruling coalition, officially announced plans to move the state capital back to Finfinne