Mumbai formerly Bombay, is the capital of the Indian state of Maharashtra and the financial capital of India. With an estimated population of thirteen million, it is the second most populous city in the world. Along with the neighbouring suburbs of Navi Mumbai and Thane, it forms, at nineteen million, the world's fifth most populous metropolitan area. Mumbai lies on the west coast of India and has a deep natural harbour. Mumbai's port handles over half of India's maritime cargo.