| 1 | Colchester County High School for Girls Period 202425 | 100.0% | Grammar · Day · 6th | Colchester, East of England | Outstanding |
| 2 | Colchester Royal Grammar School Period 202425 | 100.0% | Grammar · Boarding · 6th | Colchester, East of England | Inadequate |
| 3 | King Edward VI Grammar School, Chelmsford Period 202425 | 100.0% | Grammar · Day · 6th | Chelmsford, East of England | Outstanding |
| 4 | Chelmsford County High School for Girls Period 202425 | 99.4% | Grammar · Day · 6th | Chelmsford, East of England | Outstanding |
| 5 | Southend High School for Girls Period 202425 | 98.9% | Grammar · Day · 6th | Southend-on-Sea, East of England | Outstanding |
| 6 | Westcliff High School for Boys Academy Period 202425 | 97.7% | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 7 | Westcliff High School for Girls Period 202425 | 97.3% | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 8 | Southend High School for Boys Period 202425 | 97.2% | Grammar · Day · 6th | Southend-on-Sea, East of England | Outstanding |
| 9 | Dame Alice Owen's School Period 202425 | 87.5% | Academy · Day · 6th | Potters Bar, East of England | Outstanding |
| 10 | St Clement Danes School Period 202425 | 83.9% | Academy · Day · 6th | Rickmansworth, East of England | Outstanding |
| 11 | Chesterton Community College Period 202425 | 83.7% | Academy · Day · 6th | Cambridge, East of England | — |
| 12 | Sandringham School Period 202425 | 83.5% | Academy · Day · 6th | St Albans, East of England | Outstanding |
| 13 | Watford Grammar School for Boys Period 202425 | 83.3% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 14 | Watford Grammar School for Girls Period 202425 | 83.2% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 15 | Parmiter's School Period 202425 | 80.8% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 16 | Rickmansworth School Period 202425 | 80.5% | Academy · Day · 6th | Rickmansworth, East of England | Outstanding |
| 17 | Parkside Community College Period 202425 | 78.1% | Academy · Day | Cambridge, East of England | — |
| 18 | Brentwood Ursuline Convent High School Period 202425 | 77.8% | Academy · Day · 6th | Brentwood, East of England | Good |
| 19 | St George's School Period 202425 | 76.6% | Academy · Boarding · 6th | Harpenden, East of England | — |
| 20 | The Hertfordshire & Essex High School and Science College Period 202425 | 75.7% | Academy · Day · 6th | Bishop's Stortford, East of England | Outstanding |
| 21 | Sir John Lawes School Period 202425 | 75.5% | Academy · Day · 6th | Harpenden, East of England | Outstanding |
| 22 | Yavneh College Period 202425 | 75.0% | Academy · Day · 6th | Borehamwood, East of England | Good |
| 23 | St Bede's Inter-Church School Period 202425 | 73.9% | Academy · Day | Cambridge, East of England | Outstanding |
| 24 | Beaumont School Period 202425 | 73.6% | Academy · Day · 6th | St Albans, East of England | — |
| 25 | Hockerill Anglo-European College Period 202425 | 72.5% | Academy · Boarding · 6th | Bishop's Stortford, East of England | Good |