| 1 | Winchester College | 734 pupils | Independent · Boarding · 6th | Winchester, South East | — ISI · Excellent |
| 2 | Tonbridge School | 803 pupils | Independent · Boarding · 6th | Tonbridge, South East | — ISI · Good |
| 3 | Sevenoaks School | 1,244 pupils | Independent · Boarding · 6th | Sevenoaks, South East | — ISI · Good |
| 4 | Magdalen College School | 950 pupils | Independent · Day · 6th | Oxford, South East | — ISI · Good |
| 5 | Brighton College | 1,287 pupils | Independent · Boarding · 6th | Brighton, South East | — ISI · Good |
| 6 | Eton College | 1,346 pupils | Independent · Boarding · 6th | Windsor, South East | — ISI · Good |
| 7 | Charterhouse | 996 pupils | Independent · Boarding · 6th | Godalming, South East | — ISI · Good |
| 8 | Guildford High School | 1,021 pupils | Independent · Day · 6th | Guildford, South East | — ISI · Good |
| 9 | The King's School Canterbury | 958 pupils | Independent · Boarding · 6th | Canterbury, South East | — ISI · Good |
| 10 | Wycombe Abbey | 644 pupils | Independent · Boarding · 6th | High Wycombe, South East | — ISI · Good |
| 11 | Bedales School | 768 pupils | Independent · Boarding · 6th | Petersfield, South East | — ISI · Good |
| 12 | Radley College | 762 pupils | Independent · Boarding · 6th | Unknown, South East | — ISI · Good |
| 13 | Royal Grammar School Guildford | 1,311 pupils | Independent · Day · 6th | Unknown, South East | — |
| 14 | Tudor Hall School | 277 pupils | Independent · Boarding · 6th | Banbury, South East | — ISI · Good |
| 15 | Wellington College | 1,138 pupils | Independent · Boarding · 6th | Unknown, South East | — ISI · Excellent |
| 16 | Headington Rye Oxford | 1,150 pupils | Independent · Boarding · 6th | Oxford, South East | — |
| 17 | Benenden School | 532 pupils | Independent · Boarding · 6th | Cranbrook, South East | — ISI · Good |
| 18 | Downe House | 542 pupils | Independent · Boarding · 6th | Thatcham, South East | — ISI · Good |
| 19 | Roedean School | 615 pupils | Independent · Boarding · 6th | Brighton, South East | — ISI · Good |
| 20 | Abingdon School | 1,266 pupils | Independent · Boarding · 6th | Abingdon, South East | — ISI · Excellent |
| 21 | St Helen and St Katharine | 711 pupils | Independent · Day · 6th | Abingdon, South East | — ISI · Good |
| 22 | Stowe School | 901 pupils | Independent · Boarding · 6th | Buckingham, South East | — ISI · Good |
| 23 | Reigate Grammar School | 1,564 pupils | Independent · Day · 6th | Reigate, South East | — ISI · Good |
| 24 | Queen Anne's School | 361 pupils | Independent · Boarding · 6th | Reading, South East | — ISI · Good |
| 25 | St Swithuns | 715 pupils | Independent · Boarding · 6th | Unknown, South East | — |