| Castles Education147170 | Not applicable | — | — | 93 |
| Caythorpe Primary School144594 | Primary | Good | 22.5% | 102 |
| Chapel St Leonards Primary School145489 | Primary | Good | 52.8% | 107 |
| Charles Read Academy136479 | Secondary | Good | 40.8% | 277 |
| Cherry Willingham Primary Academy146205 | Primary | Good | 21.7% | 212 |
| Church Lane Primary School & Nursery120387 | Primary | Outstanding | 41.3% | 218 |
| Cliffedale Primary School120393 | Primary | Good | 18.3% | 284 |
| Clough and Risegate Community Primary School120412 | Primary | Good | 19.8% | 91 |
| Coleby Church of England Primary Academy152021 | Primary | Requires Improvement | 25.6% | 43 |
| Colsterworth Church of England Primary School146279 | Primary | Good | 17.0% | 159 |
| Compass Community School Lincolnshire148827 | Not applicable | — | — | 12 |
| Coningsby St Michael's Church of England Primary School145527 | Primary | Good | 28.9% | 249 |
| Conquest School152463 | Not applicable | — | — | — |
| Copthill Independent Day School & Nursery120741 | Not applicable | — | — | 292 |
| Corby Glen Community Primary School120374 | Primary | Expected standard | 32.3% | 99 |
| Corringham CofE VC Primary School120568 | Primary | Good | 23.5% | 98 |
| Cowley Academy149436 | Secondary | Good | 36.2% | 621 |
| Cranwell Primary School (Foundation)120674 | Primary | Good | 11.2% | 269 |
| De Aston School136491 | Secondary | Good | 35.7% | 939 |
| Deeping St James Community Primary School120396 | Primary | Good | 17.6% | 199 |
| Deeping St Nicholas Primary School120407 | Primary | Good | 25.7% | 70 |
| Denton CofE School120518 | Primary | Outstanding | 11.1% | 63 |
| Digby Church of England School120519 | Primary | Outstanding | 36.7% | 60 |
| Digby the Tedder Primary School120375 | Primary | Good | 8.0% | 88 |
| Dunholme St Chad's Church of England Primary School120569 | Primary | Good | 16.3% | 196 |
| Dunston St Peter's Church of England Primary School120520 | Primary | Good | 20.2% | 94 |
| Eagle Community Primary School120376 | Primary | Requires Improvement | 23.2% | 56 |
| East Wold Church of England Primary School120597 | Primary | Requires Improvement | 16.7% | 78 |
| Eastfield Infants and Nursery Academy146505 | Primary | Good | 54.4% | 204 |
| Ellison Boulters Church of England Primary School138753 | Primary | Good | 3.4% | 291 |
| Ermine Primary Academy147530 | Primary | Good | 57.7% | 400 |
| Esland Grantham School147703 | Not applicable | — | — | 39 |
| Faldingworth Community Primary School120445 | Primary | Good | 35.3% | 51 |
| Fishtoft Academy139266 | Primary | Good | 43.3% | 60 |
| Fiskerton Church of England Primary School120570 | Primary | Good | 31.9% | 72 |
| Fleet Wood Lane School120408 | Primary | Requires Improvement | 28.8% | 163 |
| Fortuna School134229 | Not applicable | Outstanding | 62.5% | 80 |
| Fosse Way Academy136790 | Primary | Good | 23.6% | 531 |
| Frances Olive Anderson Church of England (Aided) Primary School120625 | Primary | Good | 37.8% | 185 |
| Friskney All Saints Church of England Primary School148405 | Primary | Good | 53.8% | 67 |
| Frithville Primary School146586 | Primary | Requires Improvement | 68.6% | 35 |
| Fulstow Church of England Primary School149859 | Primary | Good | 30.0% | 30 |
| Gedney Church End Primary Academy151306 | Primary | Inadequate | 70.2% | 47 |
| Gedney Drove End Primary School120410 | Primary | Good | 48.5% | 33 |
| Gipsey Bridge Academy139296 | Primary | Good | 24.7% | 97 |
| Gosberton Academy144491 | Primary | Good | 32.8% | 137 |
| Gosberton House Academy143257 | Not applicable | Outstanding | 55.7% | 97 |
| Grainthorpe Junior School120450 | Primary | Good | 42.9% | 42 |
| Grantham College130759 | 16 plus | — | — | — |
| Grantham Preparatory International School120738 | Not applicable | — | — | 103 |