Dimapur District is a district of Nagaland state in India. With an area of about 70 km², it is the smallest district in the state of Nagaland. In 1918, Dimapur was leased to then Naga Hills District by then erstwhile Assam Province of British India for 30 years for construction of Railways lines. In 1963, It was again leased to now state of Nagaland for 99 years. No…Dimapur District is a district of Nagaland state in India. With an area of about 70 km², it is the smallest district in the state of Nagaland. In 1918, Dimapur was leased to then Naga Hills District by then erstwhile Assam Province of British India for 30 years for construction of Railways lines. In 1963, It was again leased to now state of Nagaland for 99 years. Now it is an inalienable part of the State of Nagaland.