Islam is the predominant religion in Senegal. 92 percent of the country's population is estimated to be Muslim, mainly Sunni of Maliki school of thought with Sufi influences. Islam has had a presence in Senegal since the 11th century. Sufi brotherhoods expanded with French colonization, as people turned to religious authority rather than the colonial administration. The main Sufi orders are the Tijaniyyah, the Muridiyyah or Mourides, and to a lesser extent, the pan-Islamic Qadiriyyah and the smaller Layene order. Approximately 1% of the Muslims follow the Ahmadiyya thought.
For nearly a millennium, there has been an Islamic presence in Senegal. Islam’s influence in the area began with the conversion of King of Takrur, War Jabi in 1040, likely as a result of the Trans-Saharan trade between North and West Africa. The King attempted to convert his subjects, who are now referred to as Tukulors or the Toucouleur people, in the first attempt to convert an entire region in this area. Other empires, such as the Jolof empire, were more resistant to Islam in favor of their traditional religion. Even in areas where an Islamic presence was found, many continued traditional animist practices, according to Portuguese accounts.
During the 17th and 18th centuries, Islam was used as a structure of power and militarism. In the 17th century, Islam became the religion of the elite and merchant classes. In 1776, the Tukulors overthrew the Denianke Dynasty and constructed a theocratic ogliarchy. Influenced by other Islamic movements throughout West Africa, they worked militaristically to convert pagan regions and establish Muslim theocratic states. This expansion ceased temporarily when the Tukulors failed to convert the pagan state of Serer. One such movement from Western Sudan was the Qadiriyya Sufi brotherhood, who traversed the Senegalese countryside gaining followers. This movement was eclipsed by the Tijaniyyah brotherhood.