| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 0 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 3 |
| Cornwall | 0 |
| Cumberland | 0 |
| Derbyshire | 0 |
| Devon | 0 |
| Dorset | 0 |
| Durham | 18 |
| Essex | 6 |
| Gloucestershire | 0 |
| Hampshire | 0 |
| Herefordshire | 0 |
| Hertfordshire | 0 |
| Huntingdonshire | 0 |
| Isle of Man | 0 |
| Kent | 8 |
| Lancashire | 25 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 6 |
| Middlesex | 3 |
| Northumberland | 16 |
| Norfolk | 0 |
| Northamptonshire | 2 |
| Nottinghamshire | 0 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 1 |
| Surrey | 0 |
| Sussex | 2 |
| Staffordshire | 1 |
| Warwickshire | 1 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 3 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 4 |
| Glamorgan | 3 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 0 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| General Servant (domestic) | 4 |
| School | 3 |
| At Home | 3 |
| Apprentice Engineer | 2 |
| School Boy | 2 |
| Clerk | 2 |
| Retired Army Pensioner | 2 |
| Pawnbroker | 2 |
| Colliery Repairer | 1 |
| Incurman & Assisman | 1 |
| Electro Plater & Metal Polisher | 1 |
| Housemaid (boarding House) | 1 |
| Electrician (wireman) | 1 |
| Janitor Croker | 1 |
| Labourer Chemical Works | 1 |
| Private Shopers | 1 |
| Warder Goade Ii | 1 |
| Farmer Grazier | 1 |
| General Labourer | 1 |
| Pownwoker Assistant | 1 |
| School Mistress | 1 |
| Unable To Work | 1 |
| Wreath Maker (foundry) | 1 |
| Wreath Maker Hawker | 1 |
| Accountant (clerk) | 1 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Costello | 89% | 7,711 |
| 2 | Castell | 67% | 3,726 |
| 3 | Costella | 78% | 820 |
| 4 | Costall | 67% | 528 |
| 5 | Castello | 78% | 457 |
| 6 | Castelli | 67% | 405 |
| 7 | Costell | 78% | 275 |
| 8 | Costelloe | 100% | 216 |
| 9 | Costelle | 89% | 153 |
The surname Costelloe is the 8th most popular variant of Costello.