<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 . 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>
where is mumbai on the map of india
on the Konkan coast on the west coast of India