Assam ranks first among all the states of North-East India in terms of density of population in the region with 397 person per sq. km followed by Tripura (350 person per sq. km), Meghalaya(132 person per sq. km), Manipur (122 person per sq. km), Nagaland (119 person per sq. km), Mizoram (51 person per sq. km) and Arunachal Pradesh (16 person per sq. Km ) according to census year 2011 .