Monggar District (Dzongkha: མོང་སྒར་རྫོང་ཁག་; Wylie: Mong-sgar rdzong-khag) is one of the 20 dzongkhags (districts) comprising Bhutan. Monggar is the fastest-developing dzongkhag in eastern Bhutan. A regional hospital has been constructed and the region is bustling with many economic activities. Monggar is noted for its lemon grass, a plant that can be used to produce an essential oil. It also has a hydro power plant on the Kuri Chhu river.
Central Mongar is the only region where the East Bodish Chali language is spoken, by about at total of 8,200 people in Wangmakhar, Gorsum and Tormazhong villages, mainly in and around Chhali Gewog on the east bank of the Kuri Chhu River.
Southern Mongar is likewise unique for its 1,000 Gongduk speakers living in a few inaccessible villages of Gongdue Gewog near the Kuri Chhu river. The language appears to be the sole representative of a unique branch of the Tibeto-Burman language family  and retains the complex verbal agreement system of Proto-Tibeto-Burman.
In southwestern Monggar, residents speak Khengkha, an East Bodish language closely related to Bumthangkha languages including Kurtöp. Bumthangkha itself is also spoken by the natives of extreme northwest Mongar. Residents of the Kuri Chhu valley of northern Monggar speak Chocha nga cha kha, a Central Bodish language very closely related to Dzongkha, the national language.
Western Monggar District contains part of Thrumshingla National Park (the gewogs of Saling and Tsamang), and northeastern Monggar District contains part of Bumdeling Wildlife Sanctuary (the gewog of Sharmung).
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