Tamenglong district is one of the nine districts of Manipur state in northeastern India. As of 2011 it is the least populous district in the state.Entirely composed of hills, ranges and narrow valleys, Tamenglong has packed some awesome features that nature has ever molded into any hilly region. Oranges of a highly poly embryonic species of Chinese origin are grown here in large scale. Exotic orchids, rare and endangered plants and animals abound Tamenglong, which is also known as the 'Land of the Hornbill'. Gan Ngai festival relating with the harvest, is celebrated for five days every year in the months of December-January.
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.