Bangladesh has a population of around 150 million people making it the seventh most populous country in the world, and with a land area of 147,570 sq. km, it is amongst the most densely populated countries in the world. The population is relatively young, with the 0–25 age group comprising 60%, while 3% are 65 or older. Life expectancy is 63 years for both males and females.
The majority ethnic group of Bangladesh is the Bengali people, comprising 98% of the population. The remainder is mostly Bihari migrants and indigenous tribal groups.
The official and most widely used language in Bangladesh, as in West Bengal, is Bangla or Bengali, an Indo-Aryan language of Sanskrit origin with its own script. English is used as second language among the middle and upper classes and in higher education.
