Religion

An uncertain but relatively large percentage of Arunachal's population are nature worshippers indigenous religions, and follow their own distinct traditional institutions like the Nyedar Namlo by the Nyishi, the Rangfrah by the  Tangsa & Nocte, Medar Melo by the Apatani, the Kargu Gamgi by the Galo and Donyi-Polo Dere by the Adi under the umbrella of the indigenous religion the Donyi-Polo.

 A small number of Arunachali people have traditionally identified as Hindus,although the number may grow as animist traditions are absorbed into Hinduism. Tibetan Buddhism predominates
in the districts of Tawang, West Kameng, and isolated regions adjacent to Tibet. Theravada Buddhism is practised by groups living near the Burmese border. Around 30% of the population are followers of the Christian faith.

According to the 2011 Indian Census, the religions of Arunachal Pradesh break down as follows:

Christian: 418,732 (30.26%)
Hindu: 401,876 (29.04%)
Others (mostly Donyi-Polo): 362,553 (26.2%)
Buddhist: 162,815 (11.76%)
Muslim: 27,045 (1.9%)
Sikh: 1,865 (0.1%)
Jain: 216 (<0.1%)

As per 2001 census, out of the 705,158 tribals living in Arunachal, 333,102 are Animist 47.24%, 186,617 are Christian 26.46%, 92,577 are Hindu 13.13%, and 82,634 are Buddhist 11.72%.

Out of the 101 recognised tribes, 37 have an animist majority Nyishi, Galo, Tagin, Adi Minyong, Adi, Apatani.etc., 23 have a Christian majority Wancho, Mossang Tangsa, Bori, Lisu or Yobin.etc., 15 have a Hindu majority Mishmi,  Mishing/Miri, Deori, Aka, Longchang Tangsa.etc.and 17 have a Buddhist majority (Monpa, Khampti, Tawang Monpa, Momba, Singpho, Sherdukpen.etc.The remaining eight tribes are multi-faith, i.e., they do not have a dominant religion Nocte,
Tangsa, Naga.etc.