| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 9 |
| Cambridgeshire | 0 |
| Channel Islands | 6 |
| Cheshire | 5 |
| Cornwall | 0 |
| Cumberland | 0 |
| Derbyshire | 0 |
| Devon | 0 |
| Dorset | 0 |
| Durham | 4 |
| Essex | 5 |
| Gloucestershire | 0 |
| Hampshire | 5 |
| Herefordshire | 0 |
| Hertfordshire | 4 |
| Huntingdonshire (and Rutland) | 1 |
| Isle of Man | 0 |
| Kent | 0 |
| Lancashire | 13 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 25 |
| Middlesex | 7 |
| Northumberland | 0 |
| Norfolk | 0 |
| Northamptonshire | 0 |
| Nottinghamshire | 0 |
| Oxfordshire | 5 |
| Rutland (and Huntingdonshire) | 1 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 0 |
| Surrey | 6 |
| Sussex | 3 |
| Staffordshire | 11 |
| Warwickshire | 0 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 3 |
| Anglesey | 0 |
| Brecknockshire | 1 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 2 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 0 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 18 |
| Tailor | 4 |
| General Labourer | 3 |
| Dress Maker | 2 |
| Plasterer | 2 |
| Braid Doubler | 2 |
| Governess | 2 |
| Soldier Depot & W B | 1 |
| Printer & Compositor | 1 |
| Printer & Stationer | 1 |
| Gardener Domestic Servant | 1 |
| Coal Miner | 1 |
| Domestic Nurse Servant | 1 |
| Grocer | 1 |
| Labourer | 1 |
| Wood Dealer | 1 |
| Brick Cutter | 1 |
| Blackmaid | 1 |
| Domestic Servant | 1 |
| Permiter | 1 |
| General Domestic Servant | 1 |
| General Servant | 1 |
| Living On Her Own Means | 1 |
| Painter | 1 |
| Living On His Own Means | 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.