| Bedfordshire | 1 |
| Buckinghamshire | 1 |
| Berkshire | 43 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 0 |
| Cornwall | 0 |
| Cumberland | 4 |
| Derbyshire | 0 |
| Devon | 0 |
| Dorset | 5 |
| Durham | 0 |
| Essex | 0 |
| Gloucestershire | 11 |
| Hampshire | 0 |
| Herefordshire | 0 |
| Hertfordshire | 3 |
| Huntingdonshire (and Rutland) | 1 |
| Isle of Man | 9 |
| Kent | 0 |
| Lancashire | 0 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 4 |
| Middlesex | 1 |
| Northumberland | 1 |
| Norfolk | 0 |
| Northamptonshire | 0 |
| Nottinghamshire | 0 |
| Oxfordshire | 6 |
| Rutland (and Huntingdonshire) | 1 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 0 |
| Surrey | 0 |
| Sussex | 5 |
| Staffordshire | 0 |
| Warwickshire | 0 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 0 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 0 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 0 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 10 |
| Annuitant | 7 |
| Agricultural Labourer | 5 |
| At Home | 4 |
| Dress Maker | 2 |
| Smith | 2 |
| Quarry Man | 2 |
| Labourer | 2 |
| Farm Labourer | 2 |
| Painter | 2 |
| Butcher | 2 |
| Brick Maker | 1 |
| Formerly Governess | 1 |
| House Servant | 1 |
| Inn Keeper | 1 |
| Pauper | 1 |
| Roadman | 1 |
| Boatman | 1 |
| Land Proprietor | 1 |
| Traveller | 1 |
| Porter | 1 |
| Servant Of All Work | 1 |
| Servant | 1 |
| Farmers Grandson | 1 |
| Retired | 1 |
| Name | Census Frequency |
|---|---|
| William Costar | 49 |
| Mary Costar | 47 |
| Elizabeth Costar | 38 |
| John Costar | 37 |
| Charles Costar | 35 |
| George Costar | 34 |
| Henry Costar | 30 |
| James Costar | 26 |
| Sarah Costar | 25 |
| Thomas Costar | 22 |
| Ann Costar | 19 |
| Alice Costar | 18 |
| Jane Costar | 18 |
| Annie Costar | 17 |
| Eliza Costar | 16 |
| Emma Costar | 16 |
| Frederick Costar | 15 |
| Ada Costar | 13 |
| Alfred Costar | 13 |
| Ellen Costar | 13 |
| Emily Costar | 11 |
| Fanny Costar | 10 |
| Margaret Costar | 10 |
| Walter Costar | 10 |
| Edward Costar | 9 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Caster | 67% | 8,566 |
| 2 | Coster | 83% | 7,154 |
| 3 | Acaster | 57% | 1,597 |
| 4 | Castree | 43% | 1,146 |
| 5 | Costar | 100% | 927 |
| 6 | Castor | 67% | 655 |
| 7 | Caister | 57% | 534 |
| 8 | Castro | 50% | 471 |
| 9 | Custar | 83% | 245 |
| 10 | Custer | 67% | 226 |
| 11 | Caistor | 57% | 201 |
| 12 | Acastor | 57% | 142 |
The surname Costar is the 5th most popular variant of Caster.