Sudan (officially the Republic of the Sudan) (Arabic: السودان As Sūdān) is a country in northeastern Africa. It is the largest country in Africa and in the Arab World, and tenth largest in the world by area. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, Kenya and Uganda to the southeast, the Democratic Republic of the Congo and the Central African Republic to the southwest, Chad to the west and Libya to the northwest. The world's longest river, the Nile River, bisects the country from south to north.
Nearly all of the population is Muslim or Christian or Animist with less than 0.1% Buddhist.