Phek is a district of Nagaland state in India. It was organized in 1973. Phek is a district in the South-eastern part of Nagaland, bounded by Myanmar in the East, Zunheboto and Tuensang districts in the North, Manipur state in the South and Kohima district in the West. Earlier a part of Kohima district, it was made a seperate district on December 21, 1973. It is inhabited by the Chakhesangs and Pochurys. The district headquarters are in the town of Phek.

According to the 2011 census Phek district has a population of 163,294, roughly equal to the nation of Saint Lucia. This gives it a ranking of 596th in India (out of a total of 640). Phek has a sex ratio of 951 females for every 1000 males, and a literacy rate of 79.13%. Currently Shri. G.H. Ramlai is the District and Sessions Judge of Phek district.