Tamenglong district (Meitei pronunciation: /tæmɛŋˈlɒŋ/) is one of the 16 districts of Manipur state in northeastern India. In 2011, Tamenglong was the least populous distrct in Manipur. In 2016, the Noney subdivision was separated as a separate district. In 1919, the British Government established four sub-divisions office in Manipur Hills known as North East Sub-Division, North West Sub-Division, South East Sub-Division and South West Sub-Division. The Headquarters of North West Sub-Division was set up at Khunjao, Tamenglong Village (Nriangluang) and Mr. William Shaw was appointed as the Sub-Divisional Officer. In 1923, the headquarters of Northwest sub-division was shifted to the present site known as Tamenglong headquarters some 3 km away from Khunjao. Later the Manipur North West sub-division was renamed as Tamenglong Sub-Division. Tamenglong became a full-fledged district in 1969 and the first Deputy Commissioner was posted. This district is bounded by Nagaland state on the north, by Senapati district on the north and east, by Churchandpur district on the south and by Imphal West district and Assam state on the west. Tamenglong town is the headquarters of this district. The district occupies an area of 4391 km. The District contains virgin forests, exotic orchids, rare and endangered plants, and wildlife. The forests contain tropical evergreen forests, subtropical forests and bamboo brakes. The dense tropical evergreen forests are located along the riversides across the district. Tamenglong is called the Land of the Hornbill as the , Great Pied Hornbill and Indian Pied Hornbill species are found here. Wildflowers include several types of orchids, including epiphytic, lithophytic and terrestrial. Tamenglong district of Manipur has a topography of irregular undulation with turbulent rivers, waterfalls, caves, lakes, and dense tropical forests covering the land. Along the river Barak there is a series of seven waterfalls. The Tharon cave (Chalem-Ky) is located at about 27 km from the district HQ.