| 151 | The Tiffin Girls' School | Outstanding | Grammar · Day · 6th | Kingston upon Thames, London | Outstanding |
| 152 | The Tower School | 59 pupils | Grammar · Day · 6th | Unknown, East of England | — |
| 153 | Three Bridges | 28 pupils | Grammar · Day · 6th | Truro, South West | — |
| 154 | Tiffin School | Good | Grammar · Day · 6th | Kingston upon Thames, London | Good |
| 155 | Tonbridge Grammar School | Outstanding | Grammar · Day · 6th | Tonbridge, South East | Outstanding |
| 156 | Torquay Boys' Grammar School | Good | Grammar · Day · 6th | Torquay, South West | Good |
| 157 | Torquay Girls' Grammar School | Outstanding | Grammar · Day · 6th | Torquay, South West | Outstanding |
| 158 | Townley Grammar School | Outstanding | Grammar · Day · 6th | Bexleyheath, London | Outstanding |
| 159 | Tunbridge Wells Girls' Grammar School | Outstanding | Grammar · Day · 6th | Tunbridge Wells, South East | Outstanding |
| 160 | Tunbridge Wells Grammar School for Boys | 1,799 pupils | Grammar · Day · 6th | Tunbridge Wells, South East | — |
| 161 | Underley Garden School | 88 pupils | Grammar · Boarding · 6th | Carnforth, North West | — |
| 162 | Upton Court Grammar School | Outstanding | Grammar · Day · 6th | Slough, South East | Outstanding |
| 163 | Upton Hall School FCJ | Outstanding | Grammar · Day · 6th | Wirral, North West | Outstanding |
| 164 | Urmston Grammar Academy | Good | Grammar · Day · 6th | Manchester, North West | Good |
| 165 | Wallington County Grammar School | 1,117 pupils | Grammar · Day · 6th | Wallington, London | — |
| 166 | Wallington High School for Girls | 1,547 pupils | Grammar · Day · 6th | Wallington, London | — |
| 167 | Weald of Kent Grammar School | 1,902 pupils | Grammar · Day · 6th | Tonbridge, South East | — |
| 168 | Westcliff High School for Boys Academy | Outstanding | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 169 | Westcliff High School for Girls | Outstanding | Grammar · Day · 6th | Westcliff-on-Sea, East of England | Outstanding |
| 170 | West Kirby Grammar School | Good | Grammar · Day · 6th | Wirral, North West | Good |
| 171 | Wilmington Grammar School for Boys | 1,178 pupils | Grammar · Day · 6th | Dartford, South East | — |
| 172 | Wilmington Grammar School for Girls | Good | Grammar · Day · 6th | Dartford, South East | Good |
| 173 | Wilson's School | Outstanding | Grammar · Day · 6th | Wallington, London | Outstanding |
| 174 | Wirral Grammar School for Boys | Good | Grammar · Day · 6th | Wirral, North West | Good |
| 175 | Wirral Grammar School for Girls | Outstanding | Grammar · Day · 6th | Wirral, North West | Outstanding |