Khulna is the third-largest city in Bangladesh, after Dhaka and Chittagong. It is the administrative centre of the Khulna District and the Khulna Di…Khulna is the third-largest city in Bangladesh, after Dhaka and Chittagong. It is the administrative centre of the Khulna District and the Khulna Division.It is the divisional centre of 10 districts of the division.Khulna is also the second largest port city of Bangladesh after Chittagong because of Port of Mongla.There is also a river port within the city named Port of Khulna.Khulna's economy is mainly marine,sea port and local industry based and it is the third-largest in Bangladesh,contributing $53 billion in gross regional domestic product and $95 billion in purchasing power parity in 2020.