| Sexton's Manor Primary School150689 | Primary | Good | 24.3% | 165 |
| Shotley Community Primary School146271 | Primary | Good | 30.9% | 81 |
| Sidegate Primary School140822 | Primary | Good | 17.1% | 649 |
| Sir Bobby Robson School147849 | Not applicable | Good | 56.7% | 60 |
| Sir John Leman High School137055 | Secondary | Good | 22.6% | 1,404 |
| Sir Peter Hall School149108 | Not applicable | Good | 60.0% | 56 |
| Sir Robert Hitcham Church of England Voluntary Aided School124774 | Primary | Good | 12.7% | 169 |
| Snape Primary School148824 | Primary | Good | 8.4% | 103 |
| Somerleyton Primary School145694 | Primary | Good | 7.5% | 67 |
| Somersham Primary School124609 | Primary | Good | 11.1% | 72 |
| South Lee School124876 | Not applicable | — | — | 205 |
| Southwold Primary School144826 | Primary | Good | 56.1% | 60 |
| Springfield Infant School and Nursery144213 | Primary | Expected standard | 24.5% | 287 |
| Springfield Junior School144329 | Primary | Good | 31.1% | 354 |
| Sprites Primary Academy141985 | Primary | Good | 28.1% | 406 |
| Sproughton Church of England Primary School142595 | Primary | Good | 9.7% | 103 |
| St Alban's Catholic High School137849 | Secondary | Good | 20.6% | 967 |
| St Benedict's Catholic School149285 | Secondary | Good | 11.6% | 968 |
| St Benet's Catholic Primary School142786 | Primary | Good | 34.8% | 69 |
| St Botolph's Church of England Voluntary Controlled Primary School124758 | Primary | Good | 16.1% | 180 |
| St Christopher's Academy143490 | Not applicable | Good | 0.0% | 0 |
| St Christopher's Cevcp School142025 | Primary | Good | 21.6% | 389 |
| St Edmund's Catholic Primary School124764 | Primary | Good | 11.3% | 443 |
| St Edmund's Catholic Primary School142770 | Primary | Good | 35.0% | 60 |
| St Edmund's Primary School143074 | Primary | Good | 26.3% | 57 |
| St Edmundsbury CofE Primary Academy151165 | Primary | Requires Improvement | 26.8% | 168 |
| St Felix Roman Catholic Primary School, Haverhill143624 | Primary | Good | 11.5% | 217 |
| St Gregory Church of England Voluntary Controlled Primary School124757 | Primary | Good | 25.3% | 227 |
| St Helen's Primary School141819 | Primary | Good | 30.3% | 439 |
| St John's Church of England Voluntary Aided Primary School, Ipswich124781 | Primary | Good | 1.4% | 212 |
| St Joseph's College124883 | Not applicable | — | — | 564 |
| St Joseph's Roman Catholic Primary School124763 | Primary | Good | 13.1% | 137 |
| St Louis Catholic Academy139448 | Primary | Good | 14.0% | 300 |
| St Margaret's Church of England Voluntary Aided Primary School, Ipswich124782 | Primary | Good | 21.1% | 413 |
| St Margaret's Primary Academy141984 | Primary | Good | 47.8% | 364 |
| St Mark's Catholic Primary School151852 | Primary | Good | 17.3% | 202 |
| St Mary's Catholic Primary School, Ipswich145382 | Primary | Outstanding | 10.0% | 210 |
| St Mary's Church of England Academy137419 | Primary | Requires Improvement | 19.6% | 414 |
| St Mary's Church of England Primary School, Hadleigh142597 | Primary | Good | 23.8% | 122 |
| St Mary's Church of England Primary School, Woodbridge142598 | Primary | Good | 7.1% | 198 |
| St Mary's Roman Catholic Primary School142806 | Primary | Good | 15.5% | 155 |
| St Matthew's Church of England Primary School, Ipswich146229 | Primary | Good | 33.4% | 407 |
| St Pancras Catholic Primary School146977 | Primary | Good | 19.6% | 153 |
| St Peter and St Paul Church of England Primary School, Eye145692 | Primary | Good | 22.4% | 200 |
| Stanton Primary School152030 | Primary | Good | 18.3% | 218 |
| Stoke College124865 | Not applicable | — | — | 119 |
| Stoke High School - Ormiston Academy140032 | Secondary | Good | 41.8% | 811 |
| Stoke-by-Nayland Church of England Primary School144553 | Primary | Good | 60.4% | 48 |
| Stone Lodge Academy141407 | Not applicable | Inadequate | 45.1% | 175 |
| Stonham Aspal Church of England Voluntary Aided Primary School124772 | Primary | Good | 10.5% | 162 |