1931 Census of England and Wales, General Report, Table 24 : " Distribution of Population in Constituencies, 1911, 1921 and 1931".

Total Population per Representative 1931   1921   1911  
No. of Constituencies No. of Members No. of Constituencies No. of Members No. of Constituencies No. of Members
Over 100,000 54 54 20 20 83 86
Over 90,000 and under 100,000 39 40 30 31 33 33
Over 80,000 and under 90,000 80 83 76 78 46 48
Over 70,000 and under 80,000 133 134 167 169 50 53
Over 60,000 and under 70,000 135 140 142 147 70 73
Over 50,000 and under 60,000 56 56 63 63 85 88
Over 40,000 and under 50,000 10 10 10 10 57 60
Over 30,000 and under 40,000 1 1 0 0 20 23
Over 20,000 and under 30,000 0 0 0 0 16 17
Over 10,000 and under 20,000 0 0 0 0 7 7
Under 10,000 (City Of London) 1 2 1 2 1 2
  509 520 509 520 468 490