Demographics of Arunachal Pradesh

The Indian state of Arunachal Pradesh has a total population of roughly 1.4 million (as of 2011) on an area of 84,000 km2, amounting to a population density of about 17 pop./km2 (far below the Indian average of 370 pop./km2 but significantly higher than similarly mountainous Ladakh). The "indigenous groups" account for about two thirds of population, while immigrants, mostly of Bengali/Hindi belt origin, account for the remaining third.

Source: Wikipedia — Demographics of Arunachal Pradesh (CC BY-SA 4.0)