History of Sudan in the context of List of Presidents of Sudan

On 25 May 1969, several young officers calling themselves the Free Officers Movement (after the Egyptian officers who instigated the Egyptian revolution of 1952) seized power in Sudan in a coup d'état and started the Nimeiry era, also called the May Regime, in the history of Sudan. Gaafar Nimeiry ruled as president with the Sudanese Socialist Union (SSU). At the conspiracy's core were nine officers led by Colonel Gaafar Nimeiry, who had been implicated in plots against the Abboud regime. Nimeiry's coup preempted plots by other groups, most of which involved army factions supported by the Sudanese Communist Party (SCP), Arab nationalists, or conservative religious groups. He justified the coup on the grounds that civilian politicians had paralyzed the decision-making process, had failed to deal with the country's economic and regional problems, and had left Sudan without a permanent constitution.

This article lists the heads of state of Sudan since the establishment of the First Sovereignty Council in 1955, prior to the country's independence.

Islam is the most common religion in Sudan and Muslims have dominated national government institutions since independence in 1956. According to UNDP Sudan, the Muslim population is 97%, including numerous Arab and non-Arab groups. The remaining 3% ascribe to either Christianity or traditional animist religions. Muslims predominate in all but Nuba Mountains region. The vast majority of Muslims in Sudan adhere to Sunni Islam of Maliki school of jurisprudence, deeply influenced with Sufism. There are also some Shia communities in Khartoum, the capital. The most significant divisions occur along the lines of the Sufi brotherhoods. Two popular brotherhoods, the Ansar and the Khatmia, are associated with the opposition Umma and Democratic Unionist Parties respectively. Only the Darfur region is traditionally lacking the presence of Sufi brotherhoods found in the rest of the country.

Shari'a law has been installed by various military regimes, and its application to non-Muslims in the capital was a contentious issue during the negotiations, but it and the other major issues underlying the north–south conflict have been largely resolved in the agreements. Shari'a is to continue to be the basis of the national legal system as it applies in the north; national legislation applicable to the south is to be based on "popular consensus, the values, and the customs of the people." In states or regions where a majority hold different religious or customary beliefs than those on which the legal system is based, the national laws may be amended to accord better with such beliefs. Throughout the country, the application of Shari'a to non-Muslims is to be limited, and courts may not exercise their discretion to impose the harsher physical forms of Shari'a penalties on non-Muslims. Sudan has had three democratic governments since 1956, all of which abolished Shari'a law.

The history of South Sudan comprises the history of the territory of present-day South Sudan and the peoples inhabiting the region.

South Sudan's modern history is closely tied to that of Sudan. These ties began in the 19th century with the southward expansion of the Ottoman Khedivate of Egypt and the establishment of Turco-Egyptian Sudan with the land that makes up modern South Sudan remaining part of Sudan through the Mahdist State, Anglo-Egyptian Sudan and the Republic of Sudan up until South Sudan's independence in 2011.