| St Thomas CofE Primary Academy146869 | Primary | Outstanding | 28.0% | 415 |
| St Wulfram's National Church of England Primary School138282 | Primary | Requires Improvement | 37.5% | 144 |
| Stamford Endowed Schools120735 | Not applicable | — | — | 1,120 |
| Stamford Junior School132760 | Not applicable | — | — | 330 |
| Stamford St Gilberts Church of England Primary School139178 | Primary | Good | 14.5% | 297 |
| Stamford Welland Academy137600 | Secondary | Good | 36.2% | 597 |
| Staniland Academy138752 | Primary | Good | 41.7% | 508 |
| Stickney Church of England Primary School120629 | Primary | Good | 31.3% | 144 |
| Sturton by Stow Primary School120478 | Primary | Good | 18.6% | 177 |
| Surfleet Primary School148392 | Primary | Good | 35.9% | 64 |
| Sutton Bridge Westmere Community Primary School120502 | Primary | Good | 52.3% | 216 |
| Sutton St James Community Primary School120420 | Primary | Good | 27.7% | 130 |
| Sutton-on-Sea Community Primary School120479 | Primary | Good | 68.4% | 114 |
| Swinderby All Saints Church of England Primary School120539 | Primary | Good | 30.9% | 81 |
| Swineshead St Mary's Church of England Primary School151178 | Primary | Good | 30.5% | 226 |
| Tattershall Holy Trinity Church of England Primary School145436 | Primary | Good | 18.1% | 83 |
| Tattershall Primary School120493 | Primary | Good | 31.9% | 141 |
| Tealby School120480 | Primary | Good | 17.8% | 73 |
| Tetney Primary School120482 | Primary | Good | 20.9% | 129 |
| The Banovallum School141581 | Secondary | Good | 32.5% | 608 |
| The Barnes Wallis Academy141166 | Secondary | Good | 41.7% | 509 |
| The Billinghay Church of England Primary School120515 | Primary | Good | 37.8% | 143 |
| The Bluecoat School148371 | Primary | Good | 41.4% | 141 |
| The Boston Grammar School139180 | Secondary | Good | 13.8% | 874 |
| The Butterwick Pinchbeck's Endowed CofE Primary School120683 | Primary | Good | 25.0% | 264 |
| The Claypole Church of England Primary School120544 | Primary | Good | 15.2% | 165 |
| The Cowbit St Mary's Church of England Academy152049 | Primary | Good | — | — |
| The Deepings School137873 | Secondary | Requires Improvement | 27.0% | 1,041 |
| The Donington Cowley Endowed Primary School120556 | Primary | Good | 39.8% | 254 |
| The Donington-on-Bain School120444 | Primary | Good | 11.3% | 97 |
| The Edenham Church of England School143259 | Primary | Good | 19.8% | 106 |
| The Edward Richardson Primary School, Tetford120481 | Primary | Good | 15.9% | 107 |
| The Eresby School, Spilsby139625 | Not applicable | Outstanding | 57.1% | 102 |
| The Fourfields Church of England School, Sutterton150841 | Primary | Requires Improvement | 22.5% | 142 |
| The Gainsborough Academy145954 | Secondary | Requires Improvement | 60.5% | 722 |
| The Gainsborough Charles Baines Community Primary School120492 | Primary | Requires Improvement | 53.2% | 201 |
| The Gainsborough Hillcrest Early Years Academy138330 | Primary | Good | 50.6% | 221 |
| The Gainsborough Nursery School126563 | Nursery | Good | 0.0% | 116 |
| The Gainsborough Parish Church Primary School138640 | Primary | Requires Improvement | 48.2% | 282 |
| The Gedney Hill Church of England VC Primary School120548 | Primary | Good | 28.1% | 57 |
| The Giles Academy148185 | Secondary | Good | 34.0% | 832 |
| The Gonerby Hill Foot Church of England Primary School120524 | Primary | Good | 26.3% | 251 |
| The Hackthorn Church of England Primary School120572 | Primary | Good | 8.9% | 56 |
| The Harlaxton Church of England Primary School120525 | Primary | Good | 22.8% | 171 |
| The Harrowby Church of England Primary School138283 | Primary | Requires Improvement | 68.9% | 52 |
| The Holbeach St Mark's Church of England Primary School120549 | Primary | Requires Improvement | 23.8% | 42 |
| The Holbeach William Stukeley Church of England Voluntary Aided Primary School120596 | Primary | Good | 32.3% | 316 |
| The Isaac Newton Primary School141100 | Primary | Good | 54.4% | 386 |
| The John Harrox Primary School, Moulton120418 | Primary | Good | 19.8% | 268 |
| The King's School, Grantham137166 | Secondary | Good | 6.7% | 1,216 |