| 1 | Kendrick School Period 202425 | 100.0% | Grammar · Day · 6th | Reading, South East | Outstanding |
| 2 | Dr Challoner's High School Period 202425 | 99.5% | Grammar · Day · 6th | Amersham, South East | Outstanding |
| 3 | Beaconsfield High School Period 202425 | 99.4% | Grammar · Day · 6th | Beaconsfield, South East | Outstanding |
| 4 | Aylesbury High School Period 202425 | 98.9% | Grammar · Day · 6th | Aylesbury, South East | Outstanding |
| 5 | Tonbridge Grammar School Period 202425 | 98.3% | Grammar · Day · 6th | Tonbridge, South East | Outstanding |
| 6 | Tunbridge Wells Girls' Grammar School Period 202425 | 97.9% | Grammar · Day · 6th | Tunbridge Wells, South East | Outstanding |
| 7 | Wycombe High School Period 202425 | 96.8% | Grammar · Day · 6th | High Wycombe, South East | Outstanding |
| 8 | Highworth Grammar School Period 202425 | 95.3% | Grammar · Day · 6th | Ashford, South East | — |
| 9 | Dartford Grammar School for Girls Period 202425 | 94.9% | Grammar · Day · 6th | Dartford, South East | — |
| 10 | Weald of Kent Grammar School Period 202425 | 94.5% | Grammar · Day · 6th | Tonbridge, South East | — |
| 11 | Invicta Grammar School Period 202425 | 92.8% | Grammar · Day · 6th | Maidstone, South East | Outstanding |
| 12 | The Rochester Grammar School Period 202425 | 92.4% | Grammar · Day · 6th | Rochester, South East | Good |
| 13 | Simon Langton Girls' Grammar School Period 202425 | 89.8% | Grammar · Day · 6th | Canterbury, South East | — |
| 14 | Wilmington Grammar School for Girls Period 202425 | 89.2% | Grammar · Day · 6th | Dartford, South East | Good |
| 15 | Maidstone Grammar School for Girls Period 202425 | 87.7% | Grammar · Day · 6th | Maidstone, South East | Outstanding |
| 16 | Mayfield Grammar School, Gravesend Period 202425 | 85.1% | Grammar · Day · 6th | Gravesend, South East | Outstanding |
| 17 | Fort Pitt Grammar School Period 202425 | 85.0% | Grammar · Day · 6th | Chatham, South East | Outstanding |
| 18 | Highsted Grammar School Period 202425 | 82.4% | Grammar · Day · 6th | Sittingbourne, South East | Good |
| 19 | The Holt School Period 202425 | 80.4% | Academy · Day · 6th | Wokingham, South East | Outstanding |
| 20 | Rosebery School Period 202425 | 80.0% | Academy · Day · 6th | Epsom, South East | — |
| 21 | Chatham Grammar Period 202425 | 75.5% | Grammar · Day · 6th | Chatham, South East | — |
| 22 | Dover Grammar School for Girls Period 202425 | 75.2% | Grammar · Day · 6th | Dover, South East | — |
| 23 | Didcot Girls' School Period 202425 | 72.1% | Academy · Day · 6th | Didcot, South East | — |
| 24 | Eden Girls' School, Slough Period 202425 | 68.3% | Free School · Day | Slough, South East | — |
| 25 | The Folkestone School for Girls Period 202425 | 67.3% | Grammar · Day · 6th | Folkestone, South East | Good |