| 26 | Chatham Grammar | 950 pupils | Grammar · Day · 6th | Chatham, South East | — |
| 27 | Chelmsford County High School for Girls | Outstanding | Grammar · Day · 6th | Chelmsford, East of England | Outstanding |
| 28 | Chesham Grammar School | 1,326 pupils | Grammar · Day · 6th | Chesham, South East | — |
| 29 | Chislehurst and Sidcup Grammar School | 1,517 pupils | Grammar · Day · 6th | Sidcup, London | — |
| 30 | Churston Ferrers Grammar School Academy | Good | Grammar · Day · 6th | Brixham, South West | Good |
| 31 | Clitheroe Royal Grammar School | Outstanding | Grammar · Day · 6th | Clitheroe, North West | Outstanding |
| 32 | Colchester County High School for Girls | Outstanding | Grammar · Day · 6th | Colchester, East of England | Outstanding |
| 33 | Colchester Royal Grammar School | Inadequate | Grammar · Boarding · 6th | Colchester, East of England | Inadequate |
| 34 | Colyton Grammar School | Outstanding | Grammar · Day · 6th | Colyton, South West | Outstanding |
| 35 | Cranbrook School | Good | Grammar · Boarding · 6th | Cranbrook, South East | Good |
| 36 | Dane Court Grammar School | Good | Grammar · Day · 6th | Broadstairs, South East | Good |
| 37 | Dartford Grammar School | Outstanding | Grammar · Day · 6th | Dartford, South East | Outstanding |
| 38 | Dartford Grammar School for Girls | 1,248 pupils | Grammar · Day · 6th | Dartford, South East | — |
| 39 | Denmark Road High School | Good | Grammar · Day · 6th | Gloucester, South West | Good |
| 40 | Devonport High School for Boys | Good | Grammar · Day · 6th | Plymouth, South West | Good |
| 41 | Devonport High School for Girls | Good | Grammar · Day · 6th | Plymouth, South West | Good |
| 42 | Dover Grammar School for Boys | 899 pupils | Grammar · Day · 6th | Dover, South East | — |
| 43 | Dover Grammar School for Girls | 872 pupils | Grammar · Day · 6th | Dover, South East | — |
| 44 | Dr Challoner's Grammar School | Outstanding | Grammar · Day · 6th | Amersham, South East | Outstanding |
| 45 | Dr Challoner's High School | Outstanding | Grammar · Day · 6th | Amersham, South East | Outstanding |
| 46 | Ermysted's Grammar School | Good | Grammar · Day · 6th | Skipton, Yorkshire and the Humber | Good |
| 47 | Estuary High School | Inadequate | Grammar · Day · 6th | Leigh-on-Sea, East of England | Inadequate |
| 48 | Felix House School | 5 pupils | Grammar · Day · 6th | Kingston-upon-Hull, Yorkshire and the Humber | — |
| 49 | Fort Pitt Grammar School | Outstanding | Grammar · Day · 6th | Chatham, South East | Outstanding |
| 50 | Gravesend Grammar School | 1,493 pupils | Grammar · Day · 6th | Gravesend, South East | — |