1931 Census of England and Wales, General Report, Table 17 : " London - Population and Density".

  Population (in thousands) Density (Persons per Acre)
London A.C.
(74,850 acres)		 Greater London
(443,455 acres)		 London A.C. Greater London
1861 2,808 3,223 37.5 7.3
1871 3,261 3,886 43.6 8.8
1881 3,830 4,767 51.2 10.7
1891 4,228 5,634 56.5 12.7
1901 4,536 6,581 60.6 14.8
1911 4,522 7,251 60.4 16.4
1921 4,485 7,480 59.9 16.9
1931 4,397 8,504 58.7 18.5