Islam in Bangladesh Islam in Bangladesh Bangladesh is a Muslim majority nation and Islam is official religion of the People's Republic of Bangladesh. Islam is the largest religion of Bangladesh, the Muslim population is approximately 148.5 million, which is the third largest Muslim population in the world (after Indonesia and Pakistan), constituting 90% of the total population as of 2015. Religion has always been a strong part of identity, but this has varied at different times. Bangladesh although a developing country is one of the few secular Muslim majority countries in the world. Islam was introduced to Bengal in at least 7th-8th century
Growth of Muslim Population in Medieval India School of Oriental and African Studies", Digby stated that estimate lacks accurate data in pre-census times. Marxist historian Irfan Habib criticized the book in his "Economic History of the Delhi Sultanate"(1978). K. S. Lal wrote a reply to Irfan Habib's criticism in 1979 in his book "Bias in Indian Historiography" (1979) and "Theory and Practice of Muslim State in India" (1999). Koenraad Elst, a Hindutva sympathizer, referred to Lal's statistics in his book "Negationism in India", remarking that "More research is needed before we can settle for a quantitatively accurate evaluation of Muslim rule in India, but at least we