| 1 | Reading School | 74.7 compositeOfsted18.0 AAB%11.3 VA10.8 Att816.6 EM5+18.0 | Grammar · Boarding · 6th | Reading, South East | Outstanding 2023-11-21 |
| 2 | Dartford Grammar School | 67.4 compositeOfsted17.6 VA10.8 Att818.4 EM5+20.5 | Grammar · Day · 6th | Dartford, South East | Outstanding 2022-12-06×0.85 |
| 3 | Dr Challoner's Grammar School | 65.7 compositeOfsted12.6 AAB%10.4 VA10.6 Att814.8 EM5+17.3 | Grammar · Day · 6th | Amersham, South East | Outstanding 2019-11-05×0.7 |
| 4 | Aylesbury Grammar School | 63.5 compositeOfsted15.3 AAB%6.4 VA9.7 Att814.9 EM5+17.1 | Grammar · Day · 6th | Aylesbury, South East | Outstanding 2022-11-02×0.85 |
| 5 | John Hampden Grammar School | 62.9 compositeOfsted15.3 AAB%5.7 VA9.9 Att814.5 EM5+17.6 | Grammar · Day · 6th | High Wycombe, South East | Outstanding 2022-09-14×0.85 |
| 6 | The Judd School | 62.5 compositeAAB%12.9 VA11.0 Att818.1 EM5+20.4 | Grammar · Day · 6th | Tonbridge, South East | — 2025-03-11 |
| 7 | The Royal Grammar School, High Wycombe | 61.6 compositeOfsted9.5 AAB%8.6 VA11.2 Att814.8 EM5+17.6 | Grammar · Boarding · 6th | High Wycombe, South East | Good 2019-10-09×0.7 |
| 8 | Sir Joseph Williamson's Mathematical School | 61.5 compositeOfsted15.3 AAB%5.0 VA10.5 Att813.9 EM5+16.8 | Grammar · Day · 6th | Rochester, South East | Outstanding 2023-03-21×0.85 |
| 9 | The Skinners' School | 60.0 compositeOfsted11.5 AAB%5.6 VA12.0 Att814.2 EM5+16.8 | Grammar · Day · 6th | Tunbridge Wells, South East | Good 2021-11-16×0.85 |
| 10 | The Norton Knatchbull School | 54.4 compositeOfsted13.5 AAB%2.1 VA9.0 Att813.5 EM5+16.4 | Grammar · Day · 6th | Ashford, South East | Good 2023-12-13 |
| 11 | Glyn School | 53.0 compositeOfsted18.0 AAB%2.4 VA9.4 Att811.2 EM5+12.0 | Academy · Day · 6th | Epsom, South East | Outstanding 2023-09-12 |
| 12 | Gravesend Grammar School | 51.0 compositeAAB%5.6 VA11.3 Att815.1 EM5+19.1 | Grammar · Day · 6th | Gravesend, South East | — 2025-03-18 |
| 13 | Maidstone Grammar School | 50.5 compositeAAB%4.7 VA10.9 Att815.8 EM5+19.1 | Grammar · Day · 6th | Maidstone, South East | — 2024-10-09 |
| 14 | Oakwood Park Grammar School | 50.4 compositeAAB%4.1 VA11.1 Att815.9 EM5+19.3 | Grammar · Day · 6th | Maidstone, South East | — 2024-05-02 |
| 15 | Tunbridge Wells Grammar School for Boys | 49.9 compositeAAB%4.1 VA12.1 Att814.7 EM5+18.9 | Grammar · Day · 6th | Tunbridge Wells, South East | — 2021-11-25 |
| 16 | Simon Langton Grammar School for Boys | 49.3 compositeAAB%4.9 VA10.6 Att815.4 EM5+18.4 | Grammar · Day · 6th | Canterbury, South East | — 2024-11-26 |
| 17 | Wilmington Grammar School for Boys | 47.8 compositeAAB%2.3 VA11.9 Att814.9 EM5+18.7 | Grammar · Day · 6th | Dartford, South East | — 2023-03-14 |
| 18 | The Harvey Grammar School | 46.1 compositeAAB%2.7 VA11.4 Att814.2 EM5+17.7 | Grammar · Day · 6th | Folkestone, South East | — 2022-12-14 |
| 19 | Borden Grammar School | 45.9 compositeAAB%2.7 VA11.5 Att814.6 EM5+17.2 | Grammar · Day · 6th | Sittingbourne, South East | — 2021-11-24 |
| 20 | Dover Grammar School for Boys | 45.6 compositeAAB%1.2 VA10.1 Att815.1 EM5+19.3 | Grammar · Day · 6th | Dover, South East | — 2025-01-21 |
| 21 | Holcombe Grammar School | 45.6 compositeAAB%2.0 VA11.6 Att814.4 EM5+17.6 | Grammar · Day · 6th | Chatham, South East | — 2024-03-13 |
| 22 | The Forest School | 42.4 compositeOfsted11.5 AAB%0.6 VA9.5 Att810.1 EM5+10.7 | Academy · Day · 6th | Wokingham, South East | Good 2021-06-29×0.85 |
| 23 | Desborough College | 41.6 compositeAAB%1.8 VA18.2 Att810.5 EM5+11.1 | Academy · Day · 6th | Maidenhead, South East | — 2024-05-17 |
| 24 | Leigh Academy Tonbridge | 41.5 compositeOfsted13.2 VA12.0 Att89.9 EM5+6.2 | Academy · Day · 6th | Tonbridge, South East | Good 2022-12-06×0.85 |
| 25 | Northfleet Technology College | 40.2 compositeOfsted13.2 VA13.0 Att88.2 EM5+5.7 | State · Day · 6th | Gravesend, South East | Good 2022-09-21×0.85 |