1921 Census of England and Wales, General Report with Appendices, Table 9 : " Administrative Counties (Including County Boroughs) arranged in order of 1911-1921 Increase per cent. of Population, and showing the Increase per cent. of Population in the Intercensal Periods 1911-1921 and 1901-1911 respectively, and the Number of Persons per Acre at the 1921 Census".

Administrative
County.		 Increase
or
Decrease (-)
per cent.		 Persons
per
Acre,
1921.
1911-21. 1901-11.
Flintshire 15.0 13.8 0.7
Monmouthshire 13.9 32.8 1.3
Glamorganshire 11.7 30.3 2.4
Warwickshire 11.4 15.2 2.3
Middlesex 11.2 42.1 8.4
Sussex, West 11.1 16.5 0.5
Surrey 10.0 29.4 2.0
Sussex, East 9.3 8.0 1.0
Lincolnshire (Parts of Lindsey) 9.3 16.4 0.4
Kent 9.2 8.8 1.2
Carmarthenshire 9.1 18.5 0.3
Essex 8.8 24.6 1.5
Yorks, North Riding 8.8 11.2 0.3
Durham 8.0 15.4 2.3
Buckinghamshire 7.6 11.4 0.5
Isle of Wight 7.3 7.0 1.0
Northumberland 7.1 15.5 0.6
Hertfordshire 7.0 20.5 0.8
Denbighshire 6.9 10.0 0.4
Yorks, East Riding 6.5 12.4 0.6
Cheshire 6.2 14.3 1.6
Nottingham 6.1 17.4 1.2
Bedfordshire 6.1 13.3 0.7
Isle of Ely 5.8 8.2 0.3
Southampton 5.5 20.3 0.9
Staffordshire 5.4 8.1 1.8
Soke of Peterboro. 5.0 8.7 0.9
Berkshire 5.0 8.4 0.6
Suffolk, East 5.0 8.3 0.5
Worcestershire 4.7 6.7 0.9
Carnarvonshire 4.7 -0.5 0.4
Derbyshire 4.6 14.0 1.1
Yorks, West Riding 4.5 10.3 1.8
Radnorshire 4.1 -3.0 0.1
Leicestershire 3.8 8.9 0.9
Lancashire 3.6 8.9 4.1
Lincolnshire (Parts of Holland) 3.6 6.8 0.3
Westmorland 3.4 -1.3 0.1
Brecknockshire 3.3 9.4 0.1
Gloucestershire 2.9 3.9 0.9
Cumberland 2.8 -0.4 0.3
Dorsetshire 2.2 10.5 0.4
Pembrokeshire 2.2 2.4 0.2
York, City and County of 2.1 5.6 22.5