Everything you need to know about Dhaka city. Dhaka, formerly spelled as Dacca, is the capital city of Bangladesh. It is the principal city of Dhaka Division and Dhaka District. Dhaka is the most populous city in Bangladesh and the tenth-largest city in the world, with a metropolitan area of 12 million inhabitants. It is the centre of the Greater Dhaka conurbation. Standing on the east bank of the Buriganga River, Dhaka is the political, economic and cultural heart of Bangladesh. It is one of the major cities of South Asia. Historically known as the City of Mosques, it is also nicknamed as the Rickshaw Capital of the World, with its daily traffic of over 500,000 cycle rickshaws.