The history of Nongstoin is deeply intertwined with the ancient traditions of the Khasi people. Long before Indian independence, the region was governed by the traditional Khasi Syiemships (chiefdoms). The Nongstoin Syiemship was one of the prominent independent Khasi states, characterized by a matrilineal society and a democratic system of local governance through village councils (Dorbar).
During the 19th century, the British Empire gradually extended its influence over the Khasi Hills, signing treaties with various Syiems, including that of Nongstoin. However, the British largely allowed the traditional rulers to maintain control over their internal affairs and customary laws, a practice that preserved much of the local culture.
Following India's independence in 1947, the Khasi states acceded to the Indian Union. When the state of Meghalaya was formed in 1972, the area was initially part of the undivided Khasi Hills district. On October 28, 1976, the district was bifurcated, and Nongstoin was officially established as the headquarters of the newly formed West Khasi Hills district, spurring its modern development from a large village into a structured town.