Sirajul Islam is Bangladeshi historian, writer, columnist, professor and academician.

He is also famous for his works on agriculture, British era land tenure and social history of Bengal.

He gave up his day job five years before the formal date of retirement, to make time for Banglapedia in 2000.

[2] A corresponding fellow of the Royal Historical Society, Sirajul Islam was a Senior Commonwealth Staff Fellow at the University of London (1978–79), a Senior Fulbright Scholar at Urbana-Champaign (1990–91), and a British Academy Visiting Professor (2004).

In 1991, 3 volumes of the History of Bangladesh (political, economic and socio-cultural), published by Asiatic Society, came out in his editorship.