1931 Census of England and Wales, General Report, Table 12 : " Administrative Counties (Including County Boroughs) Arranged in Order of 1921-1931 Increase per cent of Population, and showing the Increase per cent of Population in the Intercensal Periods 1921-1931 and 1911-1921 Respectively and the Percentage Gain or Loss by Migration 1921-1931".
| Adminstrative County | Percentage Increase in Population | Gain or loss (-) by migration 1921-1931 | |
|---|---|---|---|
| 1911-1921 | 1921-1931 | ||
| Middlesex | 11.9 | 31.0 | 23.9 |
| Surrey | 9.4 | 28.4 | 23.3 |
| Hertfordshire | 6.7 | 21.8 | 16.2 |
| Essex | 7.8 | 20.9 | 13.2 |
| Sussex, West | 4.9 | 18.3 | 15.5 |
| Buckinghamshire | 6.8 | 16.5 | 11.3 |
| Southampton | 4.1 | 12.0 | 5.4 |
| Oxfordshire | -0.8 | 11.9 | 7.8 |
| Soke of Peterborough | 5.2 | 11.0 | 6.2 |
| Kent | 5.3 | 10.8 | 5.5 |
| Nottinghamshire | 7.3 | 10.2 | 2.8 |
| Flintshire | 10.1 | 10.0 | 3.6 |
| Dorsetshire | -0.9 | 8.9 | 4.4 |
| Cambridgeshire | 0.6 | 8.8 | 6.0 |
| Warwickshire | 12.9 | 8.8 | 1.5 |
| Sussex, East | 2.6 | 8.4 | 7.3 |
| Leicestershire | 5.1 | 8.3 | 2.0 |
| Berkshire | 4.2 | 7.3 | 2.8 |
| Lincoln-Holland | 3.9 | 7.2 | -1.6 |
| Bedfordshire | 6.4 | 7.1 | 2.9 |
| Yorks, East Riding | 5.1 | 6.2 | -1.4 |
| Cheshire | 7.0 | 5.9 | 1.1 |
| Yorks, North Riding | 5.8 | 5.9 | -1.7 |
| Isle of Ely | 5.6 | 5.6 | -2.0 |
| Worcestershire | 4.9 | 5.5 | -0.5 |
| Devonshire | -1.6 | 5.3 | 2.3 |
| Derbyshire | 5.4 | 5.2 | -3.1 |
| Westmorland | -3.0 | 5.0 | 1.7 |
| Lincoln, Lindsey | 7.7 | 4.5 | -2.4 |
| Somersetshire | -0.6 | 4.3 | 1.4 |
| Wiltshire | 1.9 | 4.3 | -1.2 |
| Yorks, West Riding | 8.5 | 4.2 | -1.3 |
| Staffordshire | 7.4 | 4.0 | -5.0 |
| Gloucestershire | 3.5 | 3.8 | -0.7 |
| Suffolk, East | 3.9 | 2.9 | -3.0 |
| Huntingdonshire | -1.6 | 2.8 | -2.2 |
| Lincoln, Kesteven | 0.1 | 2.5 | -3.5 |
| Northumberland | 6.2 | 2.3 | -5.9 |
| Norfolk | -1.0 | 2.1 | -2.9 |
| Merionethshire | -8.3 | 1.9 | 0.8 |
| Denbighshire | 4.9 | 1.7 | -3.3 |
| Northamptonshire | 0.4 | 1.6 | -2.2 |
| Carmarthenshire | 10.1 | 1.4 | -5.0 |
| Lancashire | 4.5 | 1.3 | -3.3 |
| York, City & County of | 2.7 | 1.3 | -5.0 |
| Shropshire | -1.5 | 1.1 | -4.6 |
| Isle of Wight | -3.4 | 1.1 | 0.2 |
| Caernarvonshire | -2.7 | 0.1 | -0.2 |
| Rutlandshire | -10.7 | 0.0 | -3.6 |
| Herefordshire | -2.1 | -0.3 | -4.7 |
| Cornwall | -3.9 | -0.4 | -2.7 |
| Durham | 9.3 | -0.4 | -10.8 |
| Cumberland | 1.6 | -2.5 | -8.7 |
| London | 0.1 | -2.6 | -7.9 |
| Radnorshire | -4.1 | -2.9 | -7.6 |
| Glamorganshire | 13.5 | -3.5 | -12.2 |
| Suffolk, West | -6.6 | -3.5 | -6.7 |
| Cardiganshire | -3.7 | -4.4 | -2.4 |
| Anglesey | 0.5 | -4.5 | -6.5 |
| Monmouthshire | 15.7 | -4.7 | -14.3 |
| Montgomeryshire | -4.1 | -5.5 | -9.6 |
| Pembrokeshire | 1.7 | -5.6 | -10.1 |
| Brecknockshire | 3.0 | -6.2 | -12.0 |
