| Stowmarket High School145055 | Secondary | Good | 21.5% | 896 |
| Stowupland High School151384 | Secondary | Requires Improvement | 26.4% | 897 |
| Stradbroke Church of England Primary School145697 | Primary | Good | 12.4% | 121 |
| Stradbroke High School137901 | Secondary | Good | 21.2% | 339 |
| Stratford St Mary Primary School124675 | Primary | Good | 5.7% | 87 |
| Stutton Church of England Primary School145979 | Primary | Good | 21.3% | 75 |
| Suffolk New College130820 | 16 plus | — | — | — |
| Summerhill School124870 | Not applicable | — | — | 53 |
| Sunrise Academy149151 | Not applicable | Good | 79.5% | 44 |
| Sybil Andrews Academy140969 | Secondary | Good | 14.4% | 627 |
| Tattingstone Church of England Voluntary Controlled Primary School124744 | Primary | Good | 24.4% | 41 |
| The Albany150266 | Not applicable | Inadequate | 0.0% | 0 |
| The Albert Pye Community Primary School143492 | Primary | Good | 26.1% | 375 |
| The Ashley School137459 | Not applicable | Outstanding | 53.4% | 189 |
| The Beeches Community Primary School141849 | Primary | Good | 39.7% | 402 |
| The Bridge School147162 | Not applicable | Good | 43.5% | 216 |
| The Limes Primary Academy143671 | Primary | Good | 30.2% | 367 |
| The Oaks Primary School141842 | Primary | Outstanding | 33.1% | 451 |
| The Old School124885 | Not applicable | — | — | 36 |
| The Pines Primary School145031 | Primary | Good | 7.6% | 244 |
| The Ryes College143911 | Not applicable | — | — | 29 |
| The Willows Primary School144216 | Primary | Requires Improvement | 55.2% | 306 |
| Thomas Gainsborough School141639 | Secondary | Good | 19.4% | 1,615 |
| Thomas Mills High School & Sixth Form136782 | Secondary | Good | 18.4% | 1,001 |
| Thomas Wolsey Ormiston Academy137838 | Not applicable | Good | 32.6% | 103 |
| Thorndon Church of England Primary School149423 | Primary | Requires Improvement | 28.8% | 52 |
| Thurlow Voluntary Controlled Primary School124698 | Primary | Good | 14.1% | 78 |
| Thurston Church of England Primary Academy142562 | Primary | Good | 19.9% | 336 |
| Thurston Community College124802 | Secondary | Good | 17.7% | 1,484 |
| Tollgate Primary School140998 | Primary | Good | 30.2% | 433 |
| Trimley St Martin Primary School124614 | Primary | Good | 21.1% | 175 |
| Trimley St Mary Primary School124613 | Primary | Requires Improvement | 21.9% | 385 |
| Trinity Church of England Voluntary Aided Primary School140623 | Primary | Good | 23.7% | 156 |
| Tudor Church of England Primary School, Sudbury142026 | Primary | Good | 28.0% | 268 |
| University of Suffolk146206 | Not applicable | — | — | — |
| Waldringfield Primary School151189 | Primary | Requires Improvement | — | — |
| Walsham-le-Willows Church of England Voluntary Controlled Primary School124717 | Primary | Good | 18.3% | 126 |
| Warren School146431 | Not applicable | Good | 48.5% | 141 |
| Wells Hall Primary School144218 | Primary | Good | 19.7% | 491 |
| Wenhaston Primary School144446 | Primary | Good | 16.7% | 90 |
| West Row Academy150276 | Primary | Requires Improvement | 15.4% | 195 |
| West Suffolk College130818 | 16 plus | — | — | — |
| Westbourne Academy139288 | Secondary | Inadequate | 38.7% | 1,038 |
| Westbridge Academy142808 | Not applicable | Good | 75.0% | 4 |
| Westfield Primary Academy140044 | Primary | Good | 22.1% | 440 |
| Westgate Community Primary School and Nursery124552 | Primary | Good | 29.5% | 292 |
| Westwood Primary School139804 | Primary | Good | 46.4% | 181 |
| Wetheringsett Church of England Primary School147575 | Primary | Good | 15.8% | 38 |
| Wetheringsett Manor School148058 | Not applicable | — | — | 98 |
| Whatfield Church of England Voluntary Controlled Primary School124718 | Primary | Good | 23.1% | 39 |