| 226 | St Clere's School | 1,438 pupils | Academy · Day · 6th | Stanford-le-Hope, East of England | — |
| 227 | Monk's Walk School | 1,436 pupils | Academy · Day · 6th | Welwyn Garden City, East of England | — |
| 228 | St Albans Girls' School | 1,428 pupils | Academy · Day · 6th | St Albans, East of England | — |
| 229 | The Sweyne Park School | 1,422 pupils | Academy · Day · 6th | Rayleigh, East of England | — |
| 230 | The Knights Templar School | 1,414 pupils | Academy · Day · 6th | Baldock, East of England | — |
| 231 | The Boswells School | 1,409 pupils | Academy · Day · 6th | Chelmsford, East of England | — |
| 232 | The Stanway School | 1,383 pupils | Academy · Day | Colchester, East of England | — |
| 233 | St George's School | 1,362 pupils | Academy · Boarding · 6th | Harpenden, East of England | — |
| 234 | Biddenham International School and Sports College | 1,357 pupils | State · Day · 6th | Bedford, East of England | — |
| 235 | Hitchin Boys' School | 1,357 pupils | Academy · Day · 6th | Hitchin, East of England | — |
| 236 | Hitchin Girls' School | 1,356 pupils | Academy · Day · 6th | Hitchin, East of England | — |
| 237 | Mildenhall College Academy | 1,338 pupils | Academy · Day · 6th | Mildenhall, East of England | — |
| 238 | Westfield Academy | 1,335 pupils | Academy · Day · 6th | Watford, East of England | — |
| 239 | Chase High School | 1,321 pupils | Academy · Day · 6th | Westcliff-on-Sea, East of England | — |
| 240 | The Netherhall School | 1,266 pupils | Academy · Day · 6th | Cambridge, East of England | — |
| 241 | Benjamin Britten Academy of Music and Mathematics | 1,262 pupils | Academy · Day | Lowestoft, East of England | — |
| 242 | The Bishop's Stortford High School | 1,260 pupils | State · Day · 6th | Bishop's Stortford, East of England | — |
| 243 | Chancellor's School | 1,253 pupils | Academy · Day · 6th | Hatfield, East of England | — |
| 244 | William de Ferrers School | 1,247 pupils | Academy · Day · 6th | Chelmsford, East of England | — |
| 245 | The Priory School | 1,242 pupils | State · Day · 6th | Hitchin, East of England | — |
| 246 | Bushey Meads School | 1,236 pupils | Academy · Day · 6th | Bushey, East of England | — |
| 247 | Ormiston Bushfield Academy | 1,230 pupils | Academy · Day · 6th | Peterborough, East of England | — |
| 248 | Sandy Secondary School | 1,214 pupils | State · Day · 6th | Sandy, East of England | — |
| 249 | St John Payne Catholic School, Chelmsford | 1,210 pupils | State · Day · 6th | Chelmsford, East of England | — |
| 250 | Hethersett Academy | 1,209 pupils | Academy · Day | Norwich, East of England | — |