Kolkata (English: /kɒlˈkɑːtə/ or /kɒlˈkʌtə/, Bengali: [kolˈkata]; also known as Calcutta /kælˈkʌtə/, the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River 80 km (50 mi) west of the border with Bangladesh. It is the primary business, commercial, and financial hub of Eastern India and the main port of communication for North-East India. According to the 2011 Indian census, Kolkata is the seventh-most populous city in India, with a population of 45 lakh (4.5 million) residents within the city limits, and a population of over 1.41 crore (14.1 million) residents in the Kolkata Metropolitan Area. It is the third-most populous metropolitan area in India. In 2021, the Kolkata metropolitan area crossed 1.5 crore (15 million) reg