Islam is one of the major religions in Nigeria, with a history that spans over a millennium. While some scholars suggest that Islam was introduced to the region as early as the 9th century, it is more commonly accepted that the religion began to take root in what is now modern-day Nigeria around the 11th century. The spread of Islam was primarily facilitated by trade routes across the Sahara and the influence of Muslim merchants and scholars.
By the 19th century, the Sokoto Caliphate, founded through the Fulani Jihad led by Usman dan Fodio, established Islam as the predominant religion in northern Nigeria. The religion also spread to the southwest among the Yoruba through trade and cultural exchange.