Coordinates: 27°10′N 91°10′E / 27.167°N 91.167°E / 27.167; 91.167
Mongar District (Dzongkha: མོང་སྒར་རྫོང་ཁག་; Wylie: Mong-sgar rdzong-khag) is one of the 20 dzongkhags (districts) comprising Bhutan. Mongar is the fastest-developing dzongkhag in eastern Bhutan. A regional hospital has been constructed and the region is bustling with many economic activities. Mongar 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.
Mongar is home to a variety of Bhutanese languages and dialects. In the east, the East Bodish Tshangla (Sharchopkha) is the dominant language, also used as a regional lingua franca.
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.
Mongar is a town and the seat of Mongar District in eastern Bhutan. As of 2005 it had a population of 3502. Mongar is on the road from Thimphu to Trashigang. It is one of the oldest educational hubs of the country. It has a regional hospital and a good standard hotel, among other facilities. The important Yagang Lhakhang monastery is on the outskirts of the town.