| 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 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | Presdales School | 78.3 compositeOfsted33.3 Att821.8 EM5+23.2 | Academy · Day · 6th | Ware, East of England | Outstanding 2024-03-06 |
| 8 | Brentwood Ursuline Convent High School | 69.8 compositeOfsted21.2 Att822.6 EM5+25.9 | Academy · Day · 6th | Brentwood, East of England | Good 2023-03-07×0.85 |
| 9 | Challney High School for Girls | 57.8 compositeOfsted23.3 Att818.6 EM5+15.9 | Academy · Day | Luton, East of England | Outstanding 2020-01-14×0.7 |
| 10 | St Albans Girls' School | 52.7 composite | Academy · Day · 6th | St Albans, East of England | — 2024-11-26 |
| 11 | Hitchin Girls' School | 51.9 composite | Academy · Day · 6th | Hitchin, East of England | — 2024-10-08 |
| 12 | Loreto College | 48.3 composite | Academy · Day · 6th | St Albans, East of England | — 2024-10-15 |
| 13 | Grays Convent High School | 48.0 composite | State · Day | Grays, East of England | — 2023-05-11 |
| 14 | St Bernard's High School | 46.9 composite | Academy · Day · 6th | Westcliff-on-Sea, East of England | — 2023-03-22 |
| 15 | Bishop's Hatfield Girls' School | 43.9 composite | Academy · Day · 6th | Hatfield, East of England | — 2022-12-07 |