Colaba is a part of the city of Mumbai, India. It is one of the four peninsulas of Mumbai while the other three are Worli, Bandra and Malabar Hill. During Portuguese rule in the 16th century, the island was known as Kolbhat. After the British took over the island in the late 17th century, it was known as Kolio.

Mumbai is the capital city of the Indian state of Maharashtra. Mumbai is the financial capital and the most populous city of India with an estimated population of 12.5 million (1.25 crore). Mumbai is the centre of the Mumbai Metropolitan Region, the sixth-most populous metropolitan area in the world with a population of over 23 million living within the Mumbai Metropolitan Region. 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. Mumbai has the highest number of billionaires out of any city in India as well as in Asia.