Islam, the state religion, is the faith of 88 percent of the population, almost all of whom adhere to the Sunni branch. Hindus make up most of the remainder, and the country has small communities of Buddhists, Christians, and animists.
In the sixteenth century Christianity brought to the historic region of Bengal (now divided between Bangladesh and India) by Portuguese traders and missionaries. Aside from Bengali Christians, a significant number of the population in Bangladesh are Christians.
A vast majority (98 percent) of the people of Bangladesh are Bengalis and they speak the Bengali language. Minorities include Biharis numbering 250,000 and other tribes numbering about a million, with the Chakma being most numerous in number.