| 1 | Reading School | 97.4 compositeOfsted33.3 Att830.7 EM5+33.3 | Grammar · Boarding · 6th | Reading, South East | Outstanding 2023-11-21 |
| 2 | Dartford Grammar School | 90.9 compositeOfsted28.3 Att829.6 EM5+33.0 | Grammar · Day · 6th | Dartford, South East | Outstanding 2022-12-06×0.85 |
| 3 | John Hampden Grammar School | 87.7 compositeOfsted28.3 Att826.8 EM5+32.6 | Grammar · Day · 6th | High Wycombe, South East | Outstanding 2022-09-14×0.85 |
| 4 | Aylesbury Grammar School | 87.7 compositeOfsted28.3 Att827.6 EM5+31.7 | Grammar · Day · 6th | Aylesbury, South East | Outstanding 2022-11-02×0.85 |
| 5 | Sir Joseph Williamson's Mathematical School | 85.2 compositeOfsted28.3 Att825.7 EM5+31.2 | Grammar · Day · 6th | Rochester, South East | Outstanding 2023-03-21×0.85 |
| 6 | Dr Challoner's Grammar School | 82.8 compositeOfsted23.3 Att827.4 EM5+32.1 | Grammar · Day · 6th | Amersham, South East | Outstanding 2019-11-05×0.7 |
| 7 | The Norton Knatchbull School | 80.2 compositeOfsted25.0 Att824.9 EM5+30.3 | Grammar · Day · 6th | Ashford, South East | Good 2023-12-13 |
| 8 | The Skinners' School | 78.6 compositeOfsted21.2 Att826.2 EM5+31.1 | Grammar · Day · 6th | Tunbridge Wells, South East | Good 2021-11-16×0.85 |
| 9 | The Royal Grammar School, High Wycombe | 77.4 compositeOfsted17.5 Att827.4 EM5+32.5 | Grammar · Boarding · 6th | High Wycombe, South East | Good 2019-10-09×0.7 |
| 10 | Glyn School | 76.2 compositeOfsted33.3 Att820.7 EM5+22.2 | Academy · Day · 6th | Epsom, South East | Outstanding 2023-09-12 |
| 11 | The Judd School | 72.3 composite | Grammar · Day · 6th | Tonbridge, South East | — 2025-03-11 |
| 12 | Oakwood Park Grammar School | 66.1 composite | Grammar · Day · 6th | Maidstone, South East | — 2024-05-02 |
| 13 | Maidstone Grammar School | 65.5 composite | Grammar · Day · 6th | Maidstone, South East | — 2024-10-09 |
| 14 | Dover Grammar School for Boys | 64.6 composite | Grammar · Day · 6th | Dover, South East | — 2025-01-21 |
| 15 | Gravesend Grammar School | 64.1 composite | Grammar · Day · 6th | Gravesend, South East | — 2025-03-18 |
| 16 | Simon Langton Grammar School for Boys | 63.6 composite | Grammar · Day · 6th | Canterbury, South East | — 2024-11-26 |
| 17 | Tunbridge Wells Grammar School for Boys | 63.2 composite | Grammar · Day · 6th | Tunbridge Wells, South East | — 2021-11-25 |
| 18 | Wilmington Grammar School for Boys | 63.1 composite | Grammar · Day · 6th | Dartford, South East | — 2023-03-14 |
| 19 | The Harvey Grammar School | 60.1 composite | Grammar · Day · 6th | Folkestone, South East | — 2022-12-14 |
| 20 | Holcombe Grammar School | 60.1 composite | Grammar · Day · 6th | Chatham, South East | — 2024-03-13 |
| 21 | The Forest School | 59.9 compositeOfsted21.2 Att818.8 EM5+19.8 | Academy · Day · 6th | Wokingham, South East | Good 2021-06-29×0.85 |
| 22 | Borden Grammar School | 59.8 composite | Grammar · Day · 6th | Sittingbourne, South East | — 2021-11-24 |
| 23 | Leigh Academy Tonbridge | 47.3 compositeOfsted21.2 Att816.0 EM5+10.0 | Academy · Day · 6th | Tonbridge, South East | Good 2022-12-06×0.85 |
| 24 | Northfleet Technology College | 43.7 compositeOfsted21.2 Att813.2 EM5+9.2 | State · Day · 6th | Gravesend, South East | Good 2022-09-21×0.85 |
| 25 | The Windsor Boys' School | 41.2 composite | Academy · Day · 6th | Windsor, South East | — 2023-05-11 |