Kohima District (koʊˈhiːmə) is a district of the Indian state of Nagaland. It is the home of the Angami Nagas. As of 2011, it is the most populous district of Nagaland (out of then-12, now 16), with a population of 267,988, 45% of which is urban. The district is home to 13.55% of Nagaland's entire population. The administrative headquarters of the district is located at Kohima, the capital city of Nagaland. Kohima District is also the seventh-largest district in Nagaland with an area of .
Prior to India's independence, the area was part of Naga Hills District, with Kohima as the district headquarters.
Kohima District was created as one of the three districts of the newly inaugurated of Nagaland state on 1 December 1961. In 1973, the new districts of Phek and Wokha were created out of Kohima District, as in 1997 Dimapur District was similarly carved out. Peren District was carved out in 2003. The 2021 creation of Tseminyü District left Kohima District in its current form.
Kohima District has a hilly landscape - Kohima Urban Area, typical of the area, is stretched along the top of a mountain. The district is bounded by Tseminyü District to the north, Zünheboto District to the northeast, Phek District to the east, Senapati District of Manipur to the south, Peren to southwest and Chümoukedima District to the west. It is headquartered at Kohima, which is at an altitude of above sea level. Mount Japfü at elevation of , the highest peak in the district is located in the Southern Angami Region of the district.
In 1980, Kohima District became home to the Pulie Badze Wildlife Sanctuary, which has an area of . It is a natural habitat for Blyth’s Tragopan.
Kohima District is administered by a Deputy Commissioner, who has a number of Additional Deputy Commissioners (ADCs) and Sub-Division officers (SDOs) with responsibilities for each of the administrative circles. There exists also a District Urban Development Agency for Kohima. The current Deputy Commissioner of Kohima District is Shanavas C.