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]
Islam in Aceh is Sunni with Shafi'i mazhab in Fiqh.
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]