97 percent of the population adheres to Islam. With very few exceptions of Shia Muslims, the Sudanese Muslims are entirely adherents to Sunni branch, and Maliki school of Islamic jurisprudence, Almost all Muslims are Sunni, although there are significant distinctions between followers of different Sunni traditions. Two popular divisions, the Ansar and the Khatmia, are associated with the opposition Umma and Democratic Unionist Parties, respectively. There are significant but long-established groups of Coptic Orthodox and Greek Orthodox Christians in Khartoum and other northern cities.
There are also Ethiopian and Eritrean Orthodox communities in Khartoum and eastern Sudan, largely made up of refugees and migrants from the past few decades. Other Christian groups with smaller followings in the country include the Africa Inland Church, the Armenian Apostolic Church, the Sudan Church of Christ, the Sudan Interior Church, Jehovah's Witnesses, the Sudan Pentecostal Church, the Sudan Evangelical Presbyterian Church (in the North) Religious identity plays a role in the country's political divisions. Northern and western Muslims have dominated the country's political and economic system since independence. The NCP draws much of its support from Islamists, Salafis/Wahhabis and other conservative Arab Muslims in the north. The Umma Party has traditionally attracted Arab followers of the Ansar sect of Sufism as well as non-Arab Muslims from Darfur and Kordofan. The Democratic Unionist Party (DUP) includes both Arab and non-Arab Muslims in the north and east, especially those in the Khatmia Sufi
