| 1 | Colchester County High School for Girls | 96.5 compositeOfsted33.3 Att829.9 EM5+33.3 | Grammar · Day · 6th | Colchester, East of England | Outstanding 2023-11-28 |
| 2 | Chelmsford County High School for Girls | 96.4 compositeOfsted33.3 Att829.9 EM5+33.1 | Grammar · Day · 6th | Chelmsford, East of England | Outstanding 2024-01-23 |
| 3 | Westcliff High School for Boys Academy | 94.6 compositeOfsted33.3 Att828.7 EM5+32.6 | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding 2023-11-21 |
| 4 | Southend High School for Girls | 94.1 compositeOfsted33.3 Att827.8 EM5+33.0 | Grammar · Day · 6th | Southend-on-Sea, East of England | Outstanding 2024-07-02 |
| 5 | Westcliff High School for Girls | 93.8 compositeOfsted33.3 Att828.0 EM5+32.4 | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding 2024-02-06 |
| 6 | Southend High School for Boys | 93.1 compositeOfsted33.3 Att827.3 EM5+32.4 | Grammar · Day · 6th | Southend-on-Sea, East of England | Outstanding 2024-06-12 |
| 7 | King Edward VI Grammar School, Chelmsford | 92.5 compositeOfsted28.3 Att830.9 EM5+33.3 | Grammar · Day · 6th | Chelmsford, East of England | Outstanding 2021-12-08×0.85 |
| 8 | Dame Alice Owen's School | 89.5 compositeOfsted33.3 Att827.0 EM5+29.2 | Academy · Day · 6th | Potters Bar, East of England | Outstanding 2023-12-05 |
| 9 | Watford Grammar School for Girls | 86.3 compositeOfsted33.3 Att825.3 EM5+27.7 | Academy · Day · 6th | Watford, East of England | Outstanding 2024-03-05 |
| 10 | St Clement Danes School | 85.4 compositeOfsted33.3 Att824.1 EM5+28.0 | Academy · Day · 6th | Rickmansworth, East of England | Outstanding 2024-03-26 |
| 11 | Sandringham School | 85.3 compositeOfsted33.3 Att824.1 EM5+27.8 | Academy · Day · 6th | St Albans, East of England | Outstanding 2024-02-07 |
| 12 | Parmiter's School | 84.9 compositeOfsted33.3 Att824.6 EM5+26.9 | Academy · Day · 6th | Watford, East of England | Outstanding 2024-07-03 |
| 13 | Rickmansworth School | 82.8 compositeOfsted33.3 Att822.7 EM5+26.8 | Academy · Day · 6th | Rickmansworth, East of England | Outstanding 2023-09-19 |
| 14 | The Hertfordshire & Essex High School and Science College | 82.1 compositeOfsted33.3 Att823.6 EM5+25.2 | Academy · Day · 6th | Bishop's Stortford, East of England | Outstanding 2023-11-14 |
| 15 | Watford Grammar School for Boys | 81.6 compositeOfsted28.3 Att825.5 EM5+27.8 | Academy · Day · 6th | Watford, East of England | Outstanding 2021-10-13×0.85 |
| 16 | St Bede's Inter-Church School | 80.8 compositeOfsted33.3 Att822.8 EM5+24.6 | Academy · Day | Cambridge, East of England | Outstanding 2024-06-04 |
| 17 | Presdales School | 78.3 compositeOfsted33.3 Att821.8 EM5+23.2 | Academy · Day · 6th | Ware, East of England | Outstanding 2024-03-06 |
| 18 | Roundwood Park School | 77.7 compositeOfsted33.3 Att822.0 EM5+22.3 | Academy · Day · 6th | Harpenden, East of England | Outstanding 2023-11-28 |
| 19 | Saffron Walden County High School | 77.5 compositeOfsted33.3 Att822.1 EM5+22.1 | Academy · Day · 6th | Saffron Walden, East of England | Outstanding 2024-03-26 |
| 20 | Sir John Lawes School | 76.8 compositeOfsted28.3 Att823.3 EM5+25.2 | Academy · Day · 6th | Harpenden, East of England | Outstanding 2023-03-28×0.85 |
| 21 | Harris Academy Chafford Hundred | 76.6 compositeOfsted33.3 Att820.6 EM5+22.7 | Academy · Day · 6th | Grays, East of England | Outstanding 2024-03-20 |
| 22 | Wymondham College | 76.5 compositeOfsted33.3 Att820.9 EM5+22.3 | Academy · Boarding · 6th | Wymondham, East of England | Outstanding 2023-10-10 |
| 23 | The Broxbourne School | 76.1 compositeOfsted33.3 Att820.5 EM5+22.3 | Academy · Day · 6th | Broxbourne, East of England | Outstanding 2024-06-25 |
| 24 | Nicholas Breakspear Catholic School | 75.8 compositeOfsted33.3 Att820.9 EM5+21.5 | Academy · Day · 6th | St Albans, East of England | Outstanding 2023-11-14 |
| 25 | Jane Austen College | 74.6 compositeOfsted33.3 Att819.9 EM5+21.4 | Free School · Day · 6th | Norwich, East of England | Outstanding 2024-05-01 |