Ancient Communities of Central Himalaya: A Critical Study (From Earliest Times to CE 1000AD): In my thesis, I tried to study about the ancient communities namely Kol, Kirata, Rajya- Kirata, Kinnar, Gandharva, Nagas, Tangan-Partangan, Khasa, Kuninda,Yaudheya, Katyuries , Bhotiyas etc. The study revealed the origin, settlement, Socio-cultural and economic aspects of the communities on the basis of literary and archaeological sources. Most of the communities were the native to the place but a few of them such as Khasas migrated from Kashmir to eastern part of the Himalayas. The thesis has recreated the history of ancient inhabitants in the Central Himalayan region.