Islam is the 3rd Major religion of Sri Lanka.
9.7% of Sri Lankan Population Practices Islam. 1,967,227 persons adhering Islam as per the census of 2012.
With the arrival of Arab traders in the 7th century A.D., Islam began to flourish in Sri Lanka. The first people to profess the Islamic faith were Arab merchants and their native wives, whom they married after having them converted to Islam. By the 8th century A.D., Arab traders had controlled much of the trade on the Indian Ocean, including that of Sri Lanka. Many of them settled down on the island in large numbers, encouraging the spread of Islam. However, when the Portuguese arrived during the 16th century, many of their descendants now called the Sri Lankan Moors were mainly traders and merchants with spice trading networks spanning to the Middle East. The Portuguese colonists attacked, persecuted and destroyed the Sri Lankan Moor settlements, warehouses and trading networks. Many defeated Moors refugees escaped from the persecution to the interior in central Sri Lanka. The population of Sri Lankan Moors significantly declined during the Portuguese colonial rule due to the pogroms against the Moors. The Sinhalese ruler King Senarat of Kandy gave refuge to some of the Muslims in the central highlands and Eastern Province, Sri Lanka.
During 18th and 19th centuries, Javanese and Malaysian Muslims bought over by the Dutch and British rulers contributed to the growing Muslim population in Sri Lanka. Their descendants, now the Sri Lankan Malays, adapted several Sri Lankan Moor Islamic traditions while also contributing their unique cultural Islamic practices to other Muslim groups on the Island.