1931 Census of England and Wales, General Report, Table 7 : " Census Populations and Approximate Decennial Increases per cent in England and Wales and in Certain Other Countries".

Countries Population Approximate Decennial Increase per Cent. No. of Persons per Square Kilometre in 1931
1901 1911 1921 1931 1901-
1911		 1911-
1921		 1921-
1931
United Kingdom* 38,236,898 42,081,927 44,027,196 46,046,357 10.1 4.6 4.6 188.7
  England and Wales 32,527,843 36,070,492 37,886,699 39,952,377 10.9 4.9 5.5 264.4
  Scotland 4,472,103 4,760,904 4,882,497 4,842,980 6.5 2.5 -0.8 62.8
  Northern Ireland 1,236,952 1,250,531 1,258,000 1256561(a) 1.1 0.6 -0.2 88.9
                 
Irish Free State 3,221,823 3,139,688 — 2,971,992 -2.5 -3.6 -3.7 43.1
Channel Islands and Isle of Man 150,370 148,915 150,514 142,513 -1.0 1.1 -5.3 186
Australia, Commonwealth of † 3,773,801 4,455,005 4,535,734 6,629,839(b) 18.1 22.0 18.3 0.9
Canada, Dominion of 5,371,315 7,206,643 8,787,949 10,376,786 34.2 21.9 18.1 1.2
New Zealand, Dominion of † 815,862 1,058,312 1,271,664 1,408,138(a) 29.7 20.2 21.5 5.3
South Africa, Union of (c) 5,175,824 5,973,394 6,928,580 1,828,175 22.0 16.0 — 1.5
Indian Empire 294,361,056 315,156,396 318,942,480 352,837,778 7.1 1.2 10.6 75.3
Ceylon 3,573,419 4,110,367 4,504,549 5,312,548 15.0 9.6 17.9 80.5
Argentina — 7,885,000(d) — — — — — 2.8
Austria (e) 6,002,705 6,645,984 6,426,294 6,762,687 10.7 -3.3 3.7 80.6
Belgium (f) Present boundaries 6,751,133 7,484,708 7,465,782 8,092,004 10.9 -0.3 8.4 265.2
Former 6,693,548 7,423,784 7,401,353 — 10.9 -0.3    
Bulgaria (e) 3,744,283 4,337,513 4,846,971 6,090,215 15.8 11.7 18.3 59
Chile (g) 2,695,911 3,231,496 3,731,573 4,287,445 16.6 11.9 14.9 5.8
Columbia (h) — 5,473,000 5,855,000 7,851,000 — 17.8 34.1 6.9
Czechoslovakia (i) 12,689,134 13,599,486 13,612,424 14,729,536 7.2 0.1 9.1 104.8
Denmark (j) 2,449,540 2,757,076 3,267,831 3,550,656 12.6 18.5 9.6 82.7
Egypt § (k) 9,634,752 11,189,978 12,718,255 14,177,864 16.1 13.7 11.5  
Estonia (l) — — 1,107,059 1,126,413 — — 1.5 23.7
Finland (f) 2,712,562 3,115,197 3,364,807 3,667,067 14.8 8.0 9.0 10.7
France, Present boundaries — — 38,797,540 41,228,466 — — 6.3 74.8
Former boundaries 38,450,788 39,192,133 37,102,417 — 1.9 -5.3 —  
Germany, excluding Saar (m) 50,105,573 57,798,427 62,410,619 65,218,461 15.4 5.3 5.6 139.1
Greece (n) —   5,531,747 6,204,684 — — 15.2 47.7
Hungary (f) 6,857,225 7,615,117 7,990,202 8,688,319 11.1 4.9 8.7 93.4
Italy, Present boundaries     37,973,977 41,176,671 — — 8.4 132.8
Former 32,475,253 34,671,377 36,361,000 — 6.8 4.9 —  
Japan (exclusive of Korea and Formosa) 45,446,000 51,754,000 58,697,000 67,838,000 13.9 13.4 15.6 168.6
Latvia (o) —   1,596,131 1,900,045 — — 19.0 28.9
Mexico (i) 13,607,272 15,160,369 14,334,780 16,552,722 11.4 -4.9 17.2 8.4
Netherlands, The (p) 5,104,137 5,858,175 6,865,314 7,935,565 14.8 15.6 15.6 243.7
Norway (f) 2,240,032 2,391,872 2,649,775 2,814,194 6.8 10.8 6.2 8.7
Paraguay (q) 656,000   — 932,000 — — 11.4 2
Poland —   27,176,717 32,120,020 — — 18.2 82.7
Portugal (inc. Islands) (r) 5,423,132 5,960,056 6,032,991 6,825,883 9.0 1.3 13.1 74.4
Roumania (s) — — — 18,025,237 — — — 61.3
Spain (inc. adjacent Islands) (f) 18,594,405 19,927,150 21,303,162 23,563,867 7.2 6.9 10.6 46.7
Sweden (f) 5,136,441 5,522,403 5,904,489 6,142,191 7.5 6.9 4.0 13.6
Switzerland (f) 3,315,443 3,753,293 3,880,320 4,066,400 13.2 3.4 4.8 98.5
Turkey (Europe and Asia) (t) — — 13,648,270 16,200,694 — — 23.4 21.2
Union of Soviet Socialist Republics (u) 106,256,000 — — 147,013,600 — — 13.2 6.9
United States of America (f) 75,944,575 91,972,266 105,710,620 122,775,046 21.1 14.9 16.1 15.7
Venezuela (v) — — 3,027,000 3,491,000 — — 15.3 3.8
Yugoslavia — — 11,984,911 13,934,038 — — 16.3 56.3

* As constituted in 1931, excluding Irish Free State throughout. No Census was taken in Northern. Ireland in 1921 or 1931, and estimates of the Northern Irish population have been adopted in arriving at the United Kingdom figures for 1921 and 1931.

† Exclusive of full-blood Aboriginals.

† Including Maoris, but excluding Islands of the Cook group.

§ Excluding Nomads.

(a) The figures relate to the Census taken in 1926.

(b) The figures relate to the Census taken in 1933.

(c) The figures relate to the Census taken in 1904, 1911, 1921, 1931 (Europeans only in 1931).

(d) The figures relate to the Census taken in 1014.

(e) The figures relate to the Census taken in 1900, 1910, 1920, 1934.

(f) The figures relate to the Census taken in 1900, 1910, 1920, 1930.

(g) The figures relate to the Census taken in 1895, 1907, 1920, 1930.

(h) The figures relate to the Census taken in 1912, 1918, 1928.

(i) The figures relate to the Census taken in 1900, 1910, 1921, 1930.

(j) The figures relate to the Census taken in 1901, 1911, 1921, 1930.

(k) The figures relate to the Census taken in 1897, 1907, 1917, 1927.

(l) The figures relate to the Census taken in 1922, 1934.

(m) The figures relate to the Census taken in 1900, 1910, 1925, 1933.

(n) The figures relate to the Census taken in 1920, 1928.

(o) The figures relate to the Census taken in 1920, 1930.

(p) The figures relate to the Census taken in 1899, 1909, 1920, 1930.

(q) The figures relate to the Census taken in 1899, 1936.

(r) The figures relate to the Census taken in 1900, 1911, 1920, 1930.

(s) The figures relate to the Census taken in 1930.

(t) The figures relate to the Census taken in 1927, 1935.

(u) The figures relate to the Census taken in 1897, 1926.

(v) The figures relate to the Census taken in 1926, 1936.