Phek District (pron:/ˈfɛk/) is a district in the Indian state of Nagaland. At , the district is the seventh-most populous district in Nagaland and 596th most populous district in India with 163,418 inhabitants. The district is home to 8.26% population of Nagaland. The district headquarter is located at Phek, 120 kilometres from Kohima, the capital of Nagaland and the largest urban centre is Pfütsero. Phek District was established in 1973 when it was carved out of the erstwhile Kohima District. The name Phek comes from the word Phekrekedze, meaning watchtower. The Government of Nagaland approved Phek as a full-fledged district on 19 December 1973. The district has 14 subdivisions, namely, Pfütsero, Phek Sadar, Chetheba, Chozuba, Meluri, Chizami, Sekrüzu, Razieba, Sakraba, Zuketsa, Phor, Khuza, Khezhakeno and Phokhungri. Phek District is a mountainous region rich in flora and fauna with 70% of its land covered in evergreen forest. The highest mountain is Zanibu, with the summit over above mean sea level (AMSL). The district HQ town of Phek lies at the lowest altitude of the district at 1,524m above sea level, with the town of Pfütsero at the highest point 2,136m above. The largest rivers of the district are the Tizu, Lanyi, Arachu, and the three most important lakes are the Shilloi, Chida and Dzüdü. of its 89 recognized villages, twelve were not accessible by road at all, and of the rest, only 24 were accessible by "all-weather roads". Only 9 of the 89 villages were still to be connected to the water supply. Avakhung International Border Checkpost, also known as Avankhu in Phek district of Nagaland, is an International Border Checkpost on India–Myanmar barrier and a highway is being developed as part of the Bharatmala project (2017-2022). The summers are moderately warm with the average temperature being 27 °C without exceeding 32 °C. Monsoon starts towards the end of May and is over by the end of September. Winters are cold, in comparison to the nearby plains of Assam, with the temperature dropping to 0 °C in the coldest months of January and February.