| Wyndham Park Nursery School120364 | Nursery | Outstanding | 0.0% | 110 |
| Wygate Park Academy140498 | Primary | Good | 16.1% | 285 |
| Wyberton Primary Academy146916 | Primary | Good | 32.2% | 208 |
| Wrangle Primary Academy150429 | Primary | Good | 50.8% | 61 |
| Wragby Primary School120488 | Primary | Good | 31.0% | 171 |
| Woodlands Infant and Nursery School120436 | Primary | Good | 42.9% | 83 |
| Woodlands Academy142510 | Not applicable | Good | 68.3% | 82 |
| Witham St Hughs Academy137978 | Primary | Outstanding | 12.0% | 408 |
| Witham Prospect School146971 | Not applicable | — | — | 17 |
| Witham Hall School120727 | Not applicable | — | — | 217 |
| Winchelsea Primary School Ruskington120496 | Primary | Good | 27.8% | 218 |
| Willow School150438 | Not applicable | — | — | 9 |
| Willoughton Primary School120487 | Primary | Good | 34.1% | 44 |
| Willoughby Academy147414 | Not applicable | Good | 36.3% | 144 |
| William Lovell Church of England Academy138756 | Secondary | Requires Improvement | 50.6% | 315 |
| William Hildyard Church of England Primary and Nursery School120695 | Primary | Good | 19.5% | 218 |
| William Farr CofE Comprehensive School136415 | Secondary | Good | 15.7% | 1,479 |
| William Alvey School137565 | Primary | Good | 27.0% | 599 |
| White's Wood Academy139361 | Primary | Good | 64.0% | 203 |
| Whaplode Church of England Primary School144119 | Primary | Good | 32.5% | 194 |
| Weston St Mary Church of England Primary School140988 | Primary | Good | 63.0% | 54 |
| Weston Hills CofE Primary School120554 | Primary | Good | 26.7% | 135 |
| Westgate Academy137451 | Primary | Good | 36.5% | 441 |
| West Grantham Church of England Secondary Academy148433 | Secondary | Good | 53.8% | 390 |
| West Grantham Church of England Primary Academy148432 | Primary | Good | 66.8% | 214 |
| Welton St Mary's Church of England Primary Academy139187 | Primary | Good | 20.6% | 394 |
| Washingborough Academy137977 | Primary | Good | 20.6% | 272 |
| Warren Wood - A Specialist Academy142168 | Not applicable | Good | 63.6% | 118 |
| Walton Academy136624 | Secondary | Good | 37.3% | 903 |
| Walcott Primary School120391 | Primary | Good | 40.5% | 84 |
| Waddington Redwood Primary Academy146203 | Primary | Good | 19.8% | 293 |
| Waddington All Saints Academy145358 | Primary | Good | 13.3% | 377 |
| Waddingham Primary School120485 | Primary | Good | 19.2% | 73 |
| University of Lincoln133836 | Not applicable | — | — | — |
| University Academy Long Sutton147268 | Secondary | Requires Improvement | 39.9% | 696 |
| University Academy Holbeach137282 | Secondary | Requires Improvement | 32.4% | 1,394 |
| Tulip Academy142667 | Not applicable | Outstanding | 54.3% | 215 |
| Tudor Lodge Therapeutic School150738 | Not applicable | — | — | 21 |
| Toynton All Saints Primary School120483 | Primary | Requires Improvement | 18.4% | 141 |
| Tower Road Academy136793 | Primary | Good | 19.1% | 561 |
| Thurlby Community Primary Academy147153 | Primary | Good | 23.9% | 205 |
| Three Chestnuts151553 | Not applicable | — | — | — |
| Thomas Middlecott Academy141391 | Secondary | Requires Improvement | 37.0% | 600 |
| Theddlethorpe Academy143132 | Primary | Good | 48.0% | 103 |
| The Willows School152281 | Not applicable | — | — | — |
| The Welbourn Church of England Primary School120542 | Primary | Good | 33.8% | 74 |
| The Wainfleet Magdalen Church of England/Methodist School140185 | Primary | Good | 64.2% | 176 |
| The Uffington Church of England Primary School120541 | Primary | Good | 8.9% | 90 |
| The Tydd St Mary Church of England Primary School120614 | Primary | Outstanding | 26.9% | 104 |
| The St Sebastian's Church of England Primary School, Great Gonerby120601 | Primary | Good | 25.0% | 164 |