It has a predominantly Muslim population. This makes it the third-largest Muslim-majority country. The religion Islam is followed by 90 percent of the population. Apart from this, most Bangladeshis are Bengali Muslims. Bengali is the most widely spoken language in Bangladesh. Bangladesh has a literacy rate of 74.7%.
The rivers may be divided into five systems: (1) The Padma (or Ganges) and its deltaic streams, (2) the Meghna and the Surma river system, (3) the Jamuna and its adjoining channels, (4) the North Bengal rivers, and (5) the rivers of the Chittagong Hill Tracts and the adjoining plains.