Bengal, is a historical and geographical region in the northeast of South Asia. Today it is mainly divided between the independent nation of Bangladesh (East Bengal), and the Indian federal republic's constitutive state of West Bengal Though the population of the region is mostly rural and agrararian, two megacities — Kolkata (previously Calcutta) and Dhaka are located in Bengal. About 210 million people live in Bengal, around 60% of them in Bangladesh and the remainder in West Bengal.[1][30] The population density in the area is more than 900/km²; making it among the most densely populated areas in the world.[1][2] Bengali is the main language spoken in Bengal. English is often used for official work. Two major religions practiced in Bengal are Islam and Hinduism. In Bangladesh 88% of the population is Muslim (US State Department est. 2005) and 11% are Hindus (US State Dept. 2005). In West Bengal, Hindus are the majority with 72.5% of the population while Muslims comprise 25%, and other religions make up the remainder. Nadia is a district of the state of West Bengal, in the north east of the Republic of India. Krishnanagar is one of the important towns of this district.