<Tr> <Th> Official language </Th> <Td> Marathi </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.mcgm.gov.in </Td> </Tr> <P> Mumbai (/ mʊmˈbaɪ /; also known as Bombay, the official name until 1995) is the capital city of the Indian state of Maharashtra . It is the most populous city in India with an estimated city proper population of 12.4 million as of 2011 . Along with the neighbouring regions of the Mumbai Metropolitan Region, it is the second most populous metropolitan area in India, with a population of 21.3 million as of 2016 . Mumbai lies on the Konkan coast on the west coast of India and has a deep natural harbour . </P> <P> In 2008, Mumbai was named an alpha world city . It is also the wealthiest city in India, and has the highest number of millionaires and billionaires among all cities in India . </P>

Mumbai is located in which part of india