As a city district, Mumbai has no headquarters or subdivisions. It, along with the Mumbai Suburban District make up the metropolis of Mumbai. The city area is called the Island City OR South Mumbai OR Old Mumbai. It extends from Colaba in the south to Mahim and Sion in the north.

The city, consisting of several islands, was then ruled by Konkani-speaking Kolis and Agris. These natives ruled the islands up to 1345. Thereafter, Mumbais rulers changed through history until Islamic rulers conquered what is now Maharashtra and conquered some of the islands in 1534. Subsequently, a Muslim sultan of Gujarat took over all the islands, which were then conquered by the Portuguese.