Mokokchung (/ˌməʊkɒktʃʌŋ/) is a municipality in the Mokokchung District of the Indian state of Nagaland. It serves as the district headquarters as well as the main urban hub of Mokokchung District. Mokokchung is the cultural nerve centre of the Ao people and is economically and politically the most important urban centre in northern Nagaland. The town is made up of 16 wards, of which Kumlong, Sangtemla, Alempang and Yimyu are the largest.

Historically, Mokokchung was one of the first Naga Hills sites where the Assam Rifles, led by Britishers, established their outposts (then called stockades) in the later part of the 19th century. Much of the town initially grew around this post located in the DC Hill. The British administration was then gradually extended eastwards towards the remoter parts of the Naga Hills.

Also referred to as Ayatai Mokokchung by the citizens of the town, the incident took place on 27 December 1994, when forces of the 10th Assam Rifles and the 12th Maratha Light Infantry of the Indian Army raided upon the civilian populace of Mokokchung. The incident lasted for about 2 hours and left 89 shops, 48 houses, 17 vehicles and 7 two-wheelers reduced to ashes, excluding those destroyed by gunfire and shelling. 7 civilians were gunned down, another 5 burned alive including a child, several women raped and more than a dozen gone missing. The brutalities of the Assam Rifles have been a driving force for much Naga nationalism.

Mokokchung is located at 26°20′N 94°32′E / 26.33°N 94.53°E / 26.33; 94.53 at an elevation of 1325 metres (4347 feet) above sea level.

Mokokchung has a mild climate throughout the year. For ten months of the year, maximum temperature hovers in the mid twenties. Mokokchung also witnesses a lot of mist in the rainy months.

Mokokchung is a Municipal Committee city in district of Mokokchung, Nagaland. The Mokokchung city is divided into 18 wards for which elections are held every 5 years. The Mokokchung Municipal Committee has population of 35,913 of which 18,898 are males while 17,015 are females as per report released by Census India 2011. The population of children aged 0-6 is 3429 which is 9.55 % of total population of Mokokchung (MC). In Mokokchung Municipal Committee, the female sex ratio is 900 against state average of 931. Moreover the child sex ratio in Mokokchung is around 925 compared to Nagaland state average of 943. The literacy rate of Mokokchung city is 94.63 % higher than the state average of 79.55 %. In Mokokchung, male literacy is around 94.46 % while the female literacy rate is 94.81 %.

Mokokchung Municipal Committee has total administration over 8,327 houses to which it supplies basic amenities like water and sewerage. It is also authorize to build roads within Municipal Committee limits and impose taxes on properties coming under its jurisdiction.

Mokokchung lies at the centre of the urban areas of Mokokchung district, a series of settlements from Alichen in the south, through Mokokchung town up to Amenyong and Khensa in the North West; and from Mokokchung town through Fazl Ali College up to DEF colony in the North East.