Arunachal Pradesh is a state in the northeastern region of India. It’s the largest of the Seven Sister States of Northeast India by area. As per provisional reports of Census India, the population of Arunachal Pradesh in 2011 was 1,382,611 (13.82 Lakh) and the estimated population of Arunachal Pradesh in 2025 is 1,590,000 (16 lakh.)