| 1 | Cheltenham Ladies' College | 833 pupils | Independent · Boarding · 6th | Cheltenham, South West | — ISI · Good |
| 2 | Marlborough College | 1,004 pupils | Independent · Boarding · 6th | Wiltshire, South West | — ISI · Good |
| 3 | Sherborne School | 573 pupils | Independent · Boarding · 6th | Sherborne, South West | — ISI · Good |
| 4 | Talbot Heath School | 499 pupils | Independent · Boarding · 6th | Bournemouth, South West | — ISI · Good |
| 5 | Prior Park College | 563 pupils | Independent · Boarding · 6th | Unknown, South West | — ISI · Good |
| 6 | Bryanston School | 778 pupils | Independent · Boarding · 6th | Blandford Forum, South West | — ISI · Good |
| 7 | Wells Cathedral School | 734 pupils | Independent · Boarding · 6th | Wells, South West | — ISI · Excellent |
| 8 | Dean Close School | 499 pupils | Independent · Boarding · 6th | Cheltenham, South West | — ISI · Good |
| 9 | Canford School | 646 pupils | Independent · Boarding · 6th | Wimborne, South West | — ISI · Good |
| 10 | Taunton School | 687 pupils | Independent · Boarding · 6th | Taunton, South West | — ISI · Good |
| 11 | Cheltenham College | 1,178 pupils | Independent · Boarding · 6th | Cheltenham, South West | — ISI · Excellent |
| 12 | Warminster School | 513 pupils | Independent · Boarding · 6th | Warminster, South West | — ISI · Good |
| 13 | Mount Kelly | 583 pupils | Independent · Boarding · 6th | Tavistock, South West | — ISI · Good |
| 14 | Wellington School | 861 pupils | Independent · Boarding · 6th | Wellington, South West | — |
| 15 | Plymouth College | 511 pupils | Independent · Boarding · 6th | Unknown, South West | — ISI · Good |
| 16 | Kingswood School | 894 pupils | Independent · Boarding · 6th | Bath, South West | — ISI · Good |
| 17 | Millfield School | 1,283 pupils | Independent · Boarding · 6th | Street, South West | — ISI · Good |
| 18 | Truro School | 808 pupils | Independent · Boarding · 6th | Unknown, South West | — ISI · Good |
| 19 | Monkton Combe School | 644 pupils | Independent · Boarding · 6th | Bath, South West | — ISI · Good |
| 20 | Westonbirt School | 794 pupils | Independent · Boarding · 6th | Tetbury, South West | — ISI · Good |
| 21 | Dauntsey's School | 837 pupils | Independent · Boarding · 6th | Devizes, South West | — |
| 22 | Clifton College | 1,267 pupils | Independent · Boarding · 6th | Bristol, South West | — ISI · Good |
| 23 | St Marys Calne and St Margarets Prep | 498 pupils | Independent · Boarding · 6th | Calne, South West | — |
| 24 | Wycliffe College | 587 pupils | Independent · Boarding · 6th | Stonehouse, South West | — |
| 25 | Rendcomb College | 386 pupils | Independent · Boarding · 6th | Cirencester, South West | — ISI · Good |