Islam is the dominant religion in Aceh and over 98% of the 4 million people identify as Muslim.
According to data from the 2005 census, the religious percentages in Aceh are 98.87% Islam, 0.87% Protestantism, 0.15% Buddhism, 0.09% Catholicism and 0.02% Hinduism.[1]
The earliest Islamic kingdom in Southeast Asia is Samudra Pasai, located along the northern coast of Aceh. Its earliest tombstones date back to 622 Hijri / 1226 CE. The tombstone belongs to Ibnu Mahmud and Teungku Raja Ahmad.[2]