The following is a timeline of the growth of Mumbai's population over the last four centuries:
1661: 10000 inhabitants
1664: 15000
1673: 60000 (Fryer) 1675: 60000 1718: 16000 (Cobbe) 1744: 70000 (Niebuhr) (large influx of people during the busy season) 1764: 140000 (Niebuhr), According to Historical account pg 6, pop was 60,000 1780: 100,000 Materials etc. Part III, pg 525 -- Mahim 13,726 1812: 235,000 (Hall) Fixed 165,000, migratory 50,000, famine increase 20,000 1814: 180,000 (Warden) 1830: 229,000 Lagrange 1836: 236,000 "-do- 1864: 816,562 1872: 644,605 (census) 1881: 773,196 (census) 1891: 821,764 (census) 1901: 812,912 (Greater Bombay) 1911: 1,018,388 1921: 1,244,934 1931: 1,268,936 1941: 1,686,127 1951: 2,966,902 (0.1% of the world population) 1961: 4,152,056 1971: 5,970,575 1981: 8,227,382 1991: 9,900,000 + 2,600,000 (Thané) = 12,500,000 (Greater Bombay) 2001: 16,368,084 (Greater Mumbai, incl. Thané) 2005: 18,366,089 Greater Mumbai, incl. Thane) 2011: 18,410,000 2020: 20,411,274