| 1 | Colchester Royal Grammar School Period 202425 | 77.7% | Grammar · Boarding · 6th | Colchester, East of England | Inadequate |
| 2 | King Edward VI Grammar School, Chelmsford Period 202425 | 68.4% | Grammar · Day · 6th | Chelmsford, East of England | Outstanding |
| 3 | Chelmsford County High School for Girls Period 202425 | 56.0% | Grammar · Day · 6th | Chelmsford, East of England | Outstanding |
| 4 | Dame Alice Owen's School Period 202425 | 50.9% | Academy · Day · 6th | Potters Bar, East of England | Outstanding |
| 5 | Colchester County High School for Girls Period 202425 | 44.0% | Grammar · Day · 6th | Colchester, East of England | Outstanding |
| 6 | Westcliff High School for Boys Academy Period 202425 | 42.3% | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 7 | Hitchin Boys' School Period 202425 | 34.2% | Academy · Day · 6th | Hitchin, East of England | — |
| 8 | The Thetford Academy Period 202425 | 31.6% | Academy · Day · 6th | Thetford, East of England | Good |
| 9 | St George's School Period 202425 | 31.3% | Academy · Boarding · 6th | Harpenden, East of England | — |
| 10 | Queens' School Period 202425 | 29.5% | Academy · Day · 6th | Bushey, East of England | — |
| 11 | Roundwood Park School Period 202425 | 28.8% | Academy · Day · 6th | Harpenden, East of England | Outstanding |
| 12 | Watford Grammar School for Girls Period 202425 | 27.9% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 13 | Sir John Lawes School Period 202425 | 27.5% | Academy · Day · 6th | Harpenden, East of England | Outstanding |
| 14 | St Clement Danes School Period 202425 | 27.5% | Academy · Day · 6th | Rickmansworth, East of England | Outstanding |
| 15 | Monk's Walk School Period 202425 | 27.0% | Academy · Day · 6th | Welwyn Garden City, East of England | — |
| 16 | Southend High School for Boys Period 202425 | 26.7% | Grammar · Day · 6th | Southend-on-Sea, East of England | Outstanding |
| 17 | Watford Grammar School for Boys Period 202425 | 26.5% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 18 | Marriotts School Period 202425 | 26.3% | State · Day · 6th | Stevenage, East of England | Good |
| 19 | Chesterton Community College Period 202425 | 25.6% | Academy · Day · 6th | Cambridge, East of England | — |
| 20 | Sandringham School Period 202425 | 25.3% | Academy · Day · 6th | St Albans, East of England | Outstanding |
| 21 | Beaumont School Period 202425 | 25.1% | Academy · Day · 6th | St Albans, East of England | — |
| 22 | Westcliff High School for Girls Period 202425 | 24.8% | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 23 | Parmiter's School Period 202425 | 23.8% | Academy · Day · 6th | Watford, East of England | Outstanding |
| 24 | Farlingaye High School Period 202425 | 22.9% | Academy · Day · 6th | Woodbridge, East of England | Good |
| 25 | The Hertfordshire & Essex High School and Science College Period 202425 | 22.9% | Academy · Day · 6th | Bishop's Stortford, East of England | Outstanding |