Bangladesh's tribal population

Bangladesh's tribal population consists of about 1 million people, just under 1 percent of the total population. They live primarily in the Chittagong Hills and in the regions of Mymensingh, Sylhet, and Rajshahi. The majority of the tribal population (778,425) live in rural settings, where many practice shifting cultivation. Most tribal people are of SinoTibetan descent and has distinctive Mongoloid features. They differ in their social organization, marriage customs, birth and death rites, food, and other social customs from the people of the rest of the country. They speak Tibeto-Burman languages. In the mid-1980s, the percentage distribution of tribal population by religion was Hindu 24, Buddhist 44, Christian 13, and others 19.
The four largest tribes are the Chakmas, Marmas (or Maghs), Tipperas (or Tipras), and Mros (or Moorangs). The tribes tend to intermingle and could be distinguished from one another more by differences in their dialect, dress, and customs than by tribal cohesion. Only the Chakmas and Marmas display formal tribal organization, although all groups containe distinct clans. By far the largest tribe, the Chakmas are of mixed origin but reflect more Bengali influence than any other tribe. Unlike the other tribes, the Chakmas and Marmas generally live in the highland valleys. Most Chakmas are Buddhists, but some practiced Hinduism or animism.