1931 Census of England and Wales, General Report, Table 78 : " Distribution of Foreigners (Including Persons Born Abroad of Unstated Nationality) in England and Wales, Classified by Regions and in Certain Large Towns with High Proportions".

Area Proportions per 10,000 of each sex Area Proportions per 10,000 of each sex
Male Female Male Female
ENGLAND AND WALES 53 40      
           
Regions
South East 107 89 Midland 12 10
      Midland 1 14 12
  London and five surrounding counties 129 104   Midland 2 8 6
  Greater London 158 125      
  LondonAdministrativeCounty 239 184 East 18 9
           
North 31 17 South West 22 15
  North 1 29 10      
  North 2 39 13 Wales 39 15
  North 3 21 15   Wales 1 49 19
  North 4 36 22   Wales 2 11 7
           
Towns
London S.E. 239 184   Willesden S.E. 120 102
  Stepney S.E. 1,140 1,110   Hornsey S.E. 129 91
  Holborn S.E. 1,012 558   Cardiff W.1 147 39
  Westminster S.E. 716 427      
  Bethnal Green S.E. 429 406   Wimbledon S.E. 81 98
  Hampstead S.E. 427 354   Manchester N.4 99 73
          Oxford S.E. 95 74
  St. Marylebone S.E. 427 329   Brentford and Chiswick S.E. 94 69
  City of London S.E. 580 175   Leeds N.3 86 66
  Stoke Newington S.E. 387 303      
  Hackney S.E. 351 272   Tottenham S.E. 85 66
  St. Pancras S.E. 371 221   Salford N.4 84 65
          Hove S.E. 72 73
  Kensington S.E. 308 260   Grimsby E. 113 20
  Paddington S.E. 278 194   Tynemouth N.1 116 17
  Finsbury S.E. 226 148      
  Chelsea S.E. 141 164   Acton S.E. 74 55
  Shoreditch S.E. 142 111   Southend-on-Sea S.E. 84 45
          Ealing S.E. 71 56
  Hammersmith S.E. 141 99   East Ham S.E. 88 35
  Lambeth S.E. 149 72   Bournemouth S.E. 66 51
  Islington S.E. 135 84      
  Fulham S.E. 101 74   Newport (Mon.) W.1 99 18
  Poplar S.E. 97 55   Kingston-upon-Hull N .2 85 28
          Swansea W.1 87 26
  Wandsworth S.E. 86 64   Brighton S.E. 65 43
  Bermondsey S.E. 90 22   Hastings S.E. 58 50
  Southwark S.E. 71 37      
          Cambridge E. 76 31
          Liverpool N.4 69 36
  Hendon S.E. 235 230   South Shields N.1 87 17
  Finchley S.E. 105 117   Middlesbrough N.2 86 17