| 1 | Reading School Period 202425 | 83.0 | Grammar · Boarding · 6th | Reading, South East | Outstanding |
| 2 | Dartford Grammar School Period 202425 | 79.9 | Grammar · Day · 6th | Dartford, South East | Outstanding |
| 3 | The Judd School Period 202425 | 78.4 | Grammar · Day · 6th | Tonbridge, South East | — |
| 4 | Aylesbury Grammar School Period 202425 | 74.5 | Grammar · Day · 6th | Aylesbury, South East | Outstanding |
| 5 | The Royal Grammar School, High Wycombe Period 202425 | 73.9 | Grammar · Boarding · 6th | High Wycombe, South East | Good |
| 6 | Dr Challoner's Grammar School Period 202425 | 73.9 | Grammar · Day · 6th | Amersham, South East | Outstanding |
| 7 | John Hampden Grammar School Period 202425 | 72.3 | Grammar · Day · 6th | High Wycombe, South East | Outstanding |
| 8 | The Skinners' School Period 202425 | 70.8 | Grammar · Day · 6th | Tunbridge Wells, South East | Good |
| 9 | Sir Joseph Williamson's Mathematical School Period 202425 | 69.5 | Grammar · Day · 6th | Rochester, South East | Outstanding |
| 10 | Oakwood Park Grammar School Period 202425 | 68.9 | Grammar · Day · 6th | Maidstone, South East | — |
| 11 | Maidstone Grammar School Period 202425 | 68.4 | Grammar · Day · 6th | Maidstone, South East | — |
| 12 | The Norton Knatchbull School Period 202425 | 67.3 | Grammar · Day · 6th | Ashford, South East | Good |
| 13 | Simon Langton Grammar School for Boys Period 202425 | 66.8 | Grammar · Day · 6th | Canterbury, South East | — |
| 14 | Dover Grammar School for Boys Period 202425 | 65.4 | Grammar · Day · 6th | Dover, South East | — |
| 15 | Gravesend Grammar School Period 202425 | 65.3 | Grammar · Day · 6th | Gravesend, South East | — |
| 16 | Wilmington Grammar School for Boys Period 202425 | 64.6 | Grammar · Day · 6th | Dartford, South East | — |
| 17 | Tunbridge Wells Grammar School for Boys Period 202425 | 63.7 | Grammar · Day · 6th | Tunbridge Wells, South East | — |
| 18 | Borden Grammar School Period 202425 | 63.2 | Grammar · Day · 6th | Sittingbourne, South East | — |
| 19 | Holcombe Grammar School Period 202425 | 62.4 | Grammar · Day · 6th | Chatham, South East | — |
| 20 | The Harvey Grammar School Period 202425 | 61.8 | Grammar · Day · 6th | Folkestone, South East | — |
| 21 | Glyn School Period 202425 | 56.0 | Academy · Day · 6th | Epsom, South East | Outstanding |
| 22 | The Forest School Period 202425 | 50.7 | Academy · Day · 6th | Wokingham, South East | Good |
| 23 | St Birinus School Period 202425 | 48.2 | Academy · Day · 6th | Didcot, South East | — |
| 24 | The Windsor Boys' School Period 202425 | 47.8 | Academy · Day · 6th | Windsor, South East | — |
| 25 | Desborough College Period 202425 | 45.7 | Academy · Day · 6th | Maidenhead, South East | — |