Bumthang Province (Dzongkha: བུམ་ཐང་; Wylie: bum-thang) was one of the nine historical Provinces of Bhutan.
Bumthang Province occupied lands in north-central Bhutan. It was administered from the Jakar Dzong in the town of Jakar. The ruling governor was known as the Dzongpen of Bumthang, however by the 19th century, actual power was effectively in the hands of the Penlop of Trongsa, who controlled eastern Bhutan.
Under Bhutan's early theocratic dual system of government, decreasingly effective central government control resulted in the de facto disintegration of the office of Shabdrung after the death of Shabdrung Ngawang Namgyal in 1651. Under this system, the Shabdrung reigned over the temporal Druk Desi and religious Je Khenpo. Two successor Shabdrungs – the son (1651) and stepbrother (1680) of Ngawang Namgyal – were effectively controlled by the Druk Desi and Je Khenpo until power was further splintered through the innovation of multiple Shabdrung incarnations, reflecting speech, mind, and body. Increasingly secular regional lords (penlops and dzongpons) competed for power amid a backdrop of civil war over the Shabdrung and invasions from Tibet, and the Mongol Empire. The penlops of Trongsa and Paro, and the dzongpons of Punakha, Thimphu, and Wangdue Phodrang were particularly notable figures in the competition for regional dominance. During this period, there were a total of nine provinces and eight penlops and dzongpens vying for power.
Traditionally, Bhutan comprised nine provinces: Trongsa, Paro, Punakha, Wangdue Phodrang, Daga (also Taka, Tarka, or Taga), Bumthang, Thimphu, Kurtoed (also Kurtoi, Kuru-tod), and Kurmaed (or Kurme, Kuru-mad). The Provinces of Kurtoed and Kurmaed were combined into one local administration, leaving the traditional number of governors at eight. While some lords were Penlops, others held the title Dzongpen (Dzongkha: རྗོང་དཔོན་; Wylie: rjong-dpon; also "Jongpen," "Dzongpön"); both titles may be translated as "governor."
Chogyal Minjur Tenpa (1613–1680; r. 1667–1680) was the first Penlop of Trongsa (Tongsab), appointed by Shabdrung Ngawang Namgyal. He was born Damchho Lhundrub in Min-Chhud, Tibet, and led a monastic life from childhood. Before his appointment as Tongsab, he held the appointed post of Umzey (Chant Master). A trusted follower of the Shabdrung, Minjur Tenpa was sent to subdue kings of Bumthang, Lhuntse, Trashigang, Zhemgang, and other lords from Trongsa Dzong. After doing so, the Tongsab divided his control in the east among eight regions (Shachho Khorlo Tsegay), overseen by Dungpas and Kutshabs (civil servants). He went on to build Jakar, Lhuentse, Trashigang, and Zhemgang Dzongs.
The Wangchuck family originated in this Bumthang region of central Bhutan. The Wangchucks belong to the Nyö clan, and are descended from Pema Lingpa, a Bhutanese Nyingmapa saint. The Nyö clan emerged as a local aristocracy, supplanting many older aristocratic families of Tibetan origin that sided with Tibet during invasions of Bhutan. In doing so, the clan came to occupy the hereditary position of Penlop of Trongsa, as well as significant national and local government positions.
A member of this elite family, the 10th Penlop of Trongsa Jigme Namgyel (r. 1853–1870) began consolidating power, paving the way for his son the 12th Penlop of Trongsa (and 21st Penlop of Paro) Ugyen Wangchuck to prevail in battle against all rival penlops and establish the monarchy in 1907. With the establishment of the monarchy and consolidation of power, the traditional roles of provinces, their rulers, and the dual system of government came to an end.