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Clockwise from top: Cuffe Parade skyline, the Gateway of India, Taj Mahal Palace Hotel, Chhatrapati Shivaji Terminus and the Bandra–Worli Sea Link.
Nickname(s): City of Seven Islands, City of Dreams, Gateway to India, Hollywood of India
Mumbai is located in Maharashtra
Mumbai is located in India
Location of Mumbai in Maharashtra, India
Coordinates: 18°58′30″N 72°49′33″E / 18.97500°N 72.82583°E / 18.97500; 72.82583Coordinates: 18°58′30″N 72°49′33″E / 18.97500°N 72.82583°E / 18.97500; 72.82583
Country  India
State Maharashtra
District Mumbai City
Mumbai Suburban
Former name Bombay
Official Language Marathi
Native Language Marathi (Maharashtrian Konkani)
First settled 1507
Named for Mumbadevi
 • Type Mayor–Council
 • Body MCGM
 • Mayor Snehal Ambekar (Shiv Sena)
 • Municipal commissioner Ajoy Mehta
 • Megacity 603 km2 (233 sq mi)
 • Metro 4,355 km2 (1,681.5 sq mi)
Elevation 14 m (46 ft)
Population (2011)
 • Megacity 12,442,373
 • Rank 1st
 • Density 21,000/km2 (53,000/sq mi)
 • Metro 18,414,288
20,748,395(Extended UA)
 • Metro Rank 1st
Demonym(s) Mumbaikar
Time zone IST (UTC+5:30)
PIN code(s) 400 001 to 400 107
Area code(s) +91-22
Vehicle registration MH-01 (Central), MH-02 (West), MH-03 (East), MH-47 (North)
GDP/ Nominal Maharashtra $0.3 trillion (2015)
GDP per capita $2,000 (2015)
Website www.mcgm.gov.in
Population growth 
Census Pop.
1971 5,970,575
1981 8,243,405 38.1%
1991 9,925,891 20.4%
2001 11,914,398 20.0%
2011 12,478,447 4.7%
Source: MMRDA
Data is based on
Government of India Census.

Mumbai (/mʊmˈb/; 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 and the ninth most populous agglomeration in the world, with an estimated city population of 18.4 million. Along with the neighbouring regions of the Mumbai Metropolitan Region, it is one of the most populous urban regions in the world and the second most populous metropolitan area in India, with a population of 20.7 million as of 2011. Mumbai lies on the west coast of India and has a deep natural harbour. In 2009, Mumbai was named an alpha world city. It is also the wealthiest city in India, and has the highest GDP of any city in South, West, or Central Asia. Mumbai has the highest number of billionaires and millionaires among all cities in India.