Owing to its ethnic and cultural diversity, Arunachal Pradesh has long been a spot for the syncretism of different traditional religions. Most followers of the native Donyi-Polo religion live in Arunachal Pradesh, and the province is also home to substantial Hindu, Buddhist and Christian populations, the latter introduced by missionaries over the past century. A small Muslim presence also exists in the province.
According to the 2001 Indian Census, the religions of Arunachal Pradesh break down as follows: