G R O Index County Codes

ROMAN NUMERALS (1837 - 1851)

I - III         London and Middlesex
IV              London and Surrey
V               Kent
VI              Bedfordshire, Berkshire, Buckinghamshire and Hertfordshire
VII            Hampshire and Sussex
VIII           Dorset, Hampshire and Wiltshire
IX             Cornwall and Devon
X               Devon and Somerset
XI             Gloucester and Somerset
XII            Essex and Suffolk
XIII          Norfolk and Suffolk
XIV          Cambridge, Hampshire and Lincolnshire
XV            Leicestershire, Northamptonshire, Nottighamshire and Rutland
XVI          Oxfordshire, Staffordshire, Warwickshire and Berkshire
XVII         Staffordshire
XVIII       Gloucestershire, Shropshire, Staffordshire, Warwickshire and Worcestershire
XIX          Cheshire, Derbyshire and Flints
XX            Lancashire
XXI          Lancashire and Yorkshire
XXII        Yorkshire
XXIII       Yorkshire
XXIV       Durham and Yorkshire
XXV        Cumberland, Lancashire, Northumberland and Westmorland
XXVI       Brecknocks, Carmarthens, Glams, Herefords, Mons, Pembs, Radnors and Shropshire
XXVII     Anglesey, Caernarvons, Cardigans, Denbighs, Flints, Merioneths and Montgomeryshire

ARABIC NUMERALS AND LETTERS (1852 - 1946)

1a - 1c       London and Middlesex
1d              London, Kent and Surrey
2a              Kent and Surrey
2b              Hampshire and Sussex
2c - 2d      Berkshire and Hampshire
3a              Berkshire, Buckinghamshire, Hampshire, Middlesex and Oxfordshire
3b              Bedfordshire, Cambridgeshire, Hunts, Northamptonshire and Suffolk
4a              Essex and Suffolk
4b              Norfolk
5a              Dorset and Wiltshire
5b              Devonshire
5c              Cornwall and Somerset
6a              Gloucestershire, Herefordshire and Shropshire
6b              Staffordshire, Warwickshire and Worcestershire
6c              Warwickshire and Worcestershire
6d              Warwickshire
7a              Leicestershire, Lincolnshire and Rutland
7b              Derbyshire and Nottinghamshire
8a              Cheshire
8b - 8e      Lancashire
9a - 9d      Yorkshire
10a            Durham
10b            Cumberland, Northumberland and Westmorland
11a            Glamorgan, Monmouth and Pembrokeshire
11b            Anglesey, Brecknocks, Denbighs, Montgomeryshire, Flints and Radnorshire