TUENSANG  is one of the eight districts of Nagaland. It lies in the easternmost  part of Nagaland, and is named after the village which is situated closed by the district headquarter. The District is populated by 5 (Five) major tribes namely, Chang, Sangtam, Khiamniungan, Yimchunger, Phom and a part of Sumi.

Tuensang is bordered by Myanmar all along its eastern side. On the North lies Mon district. Tuensang touches Assam on its north on a narrow strip between Mon  on the east and Mokokchung in the West. On the South of Tuensang lies Phek District and on the west are Zunheboto and Mokokchung districts. The district has  approximately 180 Kms of international border with Myanmar.

            Physiographically,  Tuensang district is covered with hills, high ridges deep gorges and narrow valleys.

            The altitude of Tuensang, the District Heaquarter is 1371.60m above sea level. It covers an area of 4228 square kilometers which is about 25 % of the total  area of the State of Nagaland. It has a total population of 4,14,801 having a population density of  98 per sq.km  as per 2001 census.  There are 234 recognised villages and few unrecognized villages in the district.