The district is bounded on the north by Sibsagar district of Assam, on the northeast by Arunachal Pradesh, on the southeast by the nation Myanmar (Burma), on the south by Tuensang district of Nagaland and on the west by Mokokchung district. The district is situated at an altitude of 897.64 meters above sea level; the total area is 1,786 sq. km. Mon is the districts headquarter, as it is centrally located for the coronation of Angh’s (Chief). The district has four sub-divisions; Tobu, Tizit, Aboi (Champang), Naginimora. The total population of the district is 259604 according to 2001 census. The density of population is 145 persons per sq. km. and the sex ratio are 881 females per 1000 males. Literacy rate of the district is 42.25 %, and the literacy rate of male to female is 46.70%: 37.12 %.