The following is a timeline of the growth of Mumbai's population over the last four centuries:
1661: 10,000 inhabitants1664: 15,0001673: 60,000 (Fryer)1675: 60,0001718: 16,000 (Cobbe)1744: 70,000 (Niebuhr) (large influx of people during the busy season)1764: 140,000 (Niebuhr), According to Historical account pg 6, pop was 60,0001780: 100,000 Materials etc. Part III, pg 525 -- Mahim 13,7261812: 235,000 (Hall) Fixed 165,000, migratory 50,000, famine increase 20,0001814: 180,000 (Warden)1830: 229,000 Lagrange1836: 236,000 "-do-1864: 816,5621872: 644,605 (census)1881: 773,196 (census)1891: 821,764 (census)1901: 812,912 (Greater Bombay)1911: 1,018,3881921: 1,244,9341931: 1,268,9361941: 1,686,1271951: 2,966,902 (0.1% of the world population)1961: 4,152,0561971: 5,970,5751981: 8,227,3821991: 9,900,000 + 2,600,000 (Thané) = 12,500,000 (Greater Bombay)2001: 16,368,084 (Greater Mumbai, incl. Thané)2005: 18,366,088 (Greater Mumbai, incl. Thane)