Mongar (Dzongkha: མོང་སྒར) is a town and the seat of Mongar District in eastern Bhutan. As of 2005[update] 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.
The post code for Mongar post office is 43001.