Trongsa is one of the most important Dzongkhags. Trongsa Dzong had been the headquarter for eastern region and has been the seat of Trongsa Penlop. Even today, the formal investiture of the crown Prince of Bhutan as the Trongsa Penlop is observed in this Dzong.
The Dzongkhag is located in the heart of the country. It covers an area of about 1807 km², with elevation ranging from 800 meters to 4,800 meters above sea level with a total population of 15562 as of July 2012. It shares boundaries with Bumthang Dzongkhag to the northeast, Wangdiphodrang Dzongkhag to the west and Zhemgang Dzongkhag to the south.
Despite formidable rugged terrain in most parts of the Dzongkhag, the black topped East-West highway and the Trongsa-Gelephu highway passes through the Dzongkhag connecting almost all the gewogs, which serves as the main economic artery.
There are sacred monuments like tapering rock in Nabji lakhang, Kubdra,Ugen Drak and Phumzur lhakhang, which are all believed that Guru Padmasambhava had visited and meditated in this sacred sites on his way back from Bumthang to India in the 8thcentury. Very few people visit these sacred sites because of inadequate road facilities.
The other sacred spots in Trongsa are Ta-Dzong and Trongsa Dzong that lulls immense attraction of tourist.