1921 Census of England and Wales, General Report with Appendices, Table 58 : " Administrative Counties (with associated County Boroughs) and Large Towns with highest Proportions of Natives of Ireland".

Administrative
Counties.		 Proportion per 10,000
of Each Sex.		 Large Towns. Proportion per 10,000
of Each Sex.
Males. Females. Males. Females.
ENGLAND and WALES 99 94      
           
Lancashire 223 187 Bootle 656 501
Cheshire 162 147 Liverpool 410 371
Southampton 162 147 Barrow in Furness 392 319
Isle of Wight 148 128 Birkenhead 359 344
Anglesey 120 124 Wallasey 287 300
Devonshire 132 103 Salford 276 246
London 96 134 Manchester 239 221
Cumberland 120 101 St. Helens 316 134
Dorset 130 85 Plymouth 257 177
Yorks (North Riding) 137 71 Merthyr Tydfil 278 124
Surrey 86 116 Middlesbrough 256 111
Glamorganshire 126 72 Wimbledon 159 179
East Sussex 72 118      
Northumberland 113 73      
Middlesex 73 108      
Kent 87 94