Sudan or the Sudan (, ; السودان as-Sūdān), officially the Republic of the Sudan (جمهورية السودان Jumhūriyyat as-Sūdān), is a country in East Africa. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea to the east, Ethiopia to the southeast, South Sudan to the south, the Central African Republic to the southwest, Chad to the west, and Libya to the northwest. It houses 37 million people (2017) and occupies a total area of 1,861,484 square kilometres (718,722 square miles), making it the third-largest country in Africa. Sudan's predominant religion is Islam, and its official languages are Arabic and English. The capital is Khartoum, located at the confluence of the Blue and White Nile. Since 2011, Sudan is the scene of ongoing military conflict in its regions South Kordofan and Blue Nile.
Sudan's history goes back to the Pharaonic period, witnessing the kingdom of Kerma (c. undefined 2500 BC–1500 BC), the subsequent rule of the Egyptian New Kingdom (c. undefined 1500 BC–1070 BC) and the rise of the kingdom of Kush (c. undefined 785 BC–350 AD), which would in turn control Egypt itself for nearly a century. After the fall of Kush the Nubians formed the three Christian kingdoms of Nobatia, Makuria and Alodia, with the latter two lasting until around 1500. Between the 14th and 15th centuries much of Sudan was settled by Muslim (But not all Sudanese are considered Arabs). From the 16th–19th centuries, central and eastern Sudan were dominated by the Funj sultanate, while Darfur ruled the west and the Ottomans the far north. This period saw extensive Islamization.