| Castle Wood Academy140329 | Primary | Good | 35.7% | 280 |
| Castles Education147170 | Not applicable | — | — | 114 |
| Caythorpe Primary School144594 | Primary | Good | 25.0% | 100 |
| Chapel St Leonards Primary School145489 | Primary | Good | 61.4% | 134 |
| Charles Read Academy136479 | Secondary | Good | 42.3% | 267 |
| Cherry Willingham Primary Academy146205 | Primary | Good | 21.2% | 203 |
| Church Lane Primary School & Nursery120387 | Primary | Outstanding | 38.5% | 221 |
| Cliffedale Primary School120393 | Primary | Good | 19.5% | 297 |
| Clough and Risegate Community Primary School120412 | Primary | Good | 21.1% | 90 |
| Coleby Church of England Primary Academy152021 | Primary | Requires Improvement | — | — |
| Colsterworth Church of England Primary School146279 | Primary | Good | 15.4% | 136 |
| Compass Community School Lincolnshire148827 | Not applicable | — | — | 17 |
| Coningsby St Michael's Church of England Primary School145527 | Primary | Good | 25.7% | 257 |
| Copthill Independent Day School & Nursery120741 | Not applicable | — | — | 299 |
| Corby Glen Community Primary School120374 | Primary | Good | 31.3% | 83 |
| Corringham CofE VC Primary School120568 | Primary | Good | 22.0% | 100 |
| Cowley Academy149436 | Secondary | Good | 35.6% | 627 |
| Cranwell Primary School (Foundation)120674 | Primary | Good | 9.7% | 289 |
| De Aston School136491 | Secondary | Good | 34.8% | 998 |
| Deeping St James Community Primary School120396 | Primary | Good | 18.1% | 199 |
| Deeping St Nicholas Primary School120407 | Primary | Good | 27.9% | 68 |
| Denton CofE School120518 | Primary | Outstanding | 16.4% | 61 |
| Digby Church of England School120519 | Primary | Outstanding | 28.6% | 56 |
| Digby the Tedder Primary School120375 | Primary | Good | 10.9% | 92 |
| Dunholme St Chad's Church of England Primary School120569 | Primary | Good | 17.2% | 203 |
| Dunston St Peter's Church of England Primary School120520 | Primary | Good | 22.2% | 81 |
| Eagle Community Primary School120376 | Primary | Requires Improvement | 22.6% | 62 |
| East Wold Church of England Primary School120597 | Primary | Requires Improvement | 11.9% | 84 |
| Eastfield Infants and Nursery Academy146505 | Primary | Good | 57.4% | 216 |
| Ellison Boulters Church of England Primary School138753 | Primary | Good | 3.2% | 284 |
| Ermine Primary Academy147530 | Primary | Good | 56.5% | 390 |
| Esland Grantham School147703 | Not applicable | — | — | 31 |
| Faldingworth Community Primary School120445 | Primary | Good | 38.2% | 55 |
| Fishtoft Academy139266 | Primary | Good | 48.6% | 70 |
| Fiskerton Church of England Primary School120570 | Primary | Good | 32.5% | 83 |
| Fleet Wood Lane School120408 | Primary | Requires Improvement | 30.7% | 163 |
| Fortuna School134229 | Not applicable | Outstanding | 68.8% | 80 |
| Fosse Way Academy136790 | Primary | Good | 24.1% | 539 |
| Frances Olive Anderson Church of England (Aided) Primary School120625 | Primary | Good | 34.1% | 173 |
| Friskney All Saints Church of England Primary School148405 | Primary | Good | 47.1% | 70 |
| Frithville Primary School146586 | Primary | Requires Improvement | 61.3% | 31 |
| Fulstow Church of England Primary School149859 | Primary | Good | 22.2% | 27 |
| Gedney Church End Primary Academy151306 | Primary | Inadequate | 63.6% | 44 |
| Gedney Drove End Primary School120410 | Primary | Good | 35.1% | 37 |
| Gipsey Bridge Academy139296 | Primary | Good | 17.4% | 92 |
| Gosberton Academy144491 | Primary | Good | 32.1% | 134 |
| Gosberton House Academy143257 | Not applicable | Outstanding | 49.5% | 99 |
| Grainthorpe Junior School120450 | Primary | Good | 44.4% | 45 |
| Grantham College130759 | 16 plus | — | — | — |
| Grantham Preparatory International School120738 | Not applicable | — | — | 108 |