| Wyndham Park Nursery School120364 | Nursery | Outstanding | 0.0% | 94 |
| Wygate Park Academy140498 | Primary | Good | 16.5% | 272 |
| Wyberton Primary Academy146916 | Primary | Good | 32.7% | 211 |
| Wrangle Primary Academy150429 | Primary | Good | 42.9% | 56 |
| Wragby Primary School120488 | Primary | Good | 27.6% | 181 |
| Woodlands Infant and Nursery School120436 | Primary | Good | 38.2% | 81 |
| Woodlands Academy142510 | Not applicable | Good | 66.3% | 83 |
| Witham St Hughs Academy137978 | Primary | Outstanding | 12.7% | 411 |
| Witham Prospect School146971 | Not applicable | — | — | 17 |
| Witham Hall School120727 | Not applicable | — | — | 225 |
| Winchelsea Primary School Ruskington120496 | Primary | Good | 31.2% | 212 |
| Willow School150438 | Not applicable | — | — | 20 |
| Willoughton Primary School120487 | Primary | Good | 33.3% | 42 |
| Willoughby Academy147414 | Not applicable | Good | 41.8% | 143 |
| William Lovell Church of England Academy138756 | Secondary | Urgent improvement | 52.2% | 347 |
| William Hildyard Church of England Primary and Nursery School120695 | Primary | Good | 20.4% | 190 |
| William Farr CofE Comprehensive School136415 | Secondary | Good | 18.4% | 1,488 |
| William Alvey School137565 | Primary | Good | 28.1% | 570 |
| White's Wood Academy139361 | Primary | Good | 64.6% | 195 |
| Whaplode Church of England Primary School144119 | Primary | Good | 36.6% | 186 |
| Weston St Mary Church of England Primary School140988 | Primary | Good | 55.7% | 61 |
| Weston Hills CofE Primary School120554 | Primary | Good | 25.2% | 135 |
| Westgate Academy137451 | Primary | Expected standard | 36.7% | 428 |
| West Grantham Church of England Secondary Academy148433 | Secondary | Good | 56.4% | 486 |
| West Grantham Church of England Primary Academy148432 | Primary | Good | 62.8% | 208 |
| Welton St Mary's Church of England Primary Academy139187 | Primary | Good | 17.5% | 389 |
| Washingborough Academy137977 | Primary | Good | 19.8% | 268 |
| Warren Wood - A Specialist Academy142168 | Not applicable | Good | 63.6% | 132 |
| Walton Academy136624 | Secondary | Good | 38.6% | 822 |
| Walcott Primary School120391 | Primary | Good | 38.3% | 81 |
| Waddington Redwood Primary Academy146203 | Primary | Good | 20.1% | 278 |
| Waddington All Saints Academy145358 | Primary | Good | 14.0% | 372 |
| Waddingham Primary School120485 | Primary | Good | 8.8% | 57 |
| University of Lincoln133836 | Not applicable | — | — | — |
| University Academy Long Sutton147268 | Secondary | Requires Improvement | 42.5% | 708 |
| University Academy Holbeach137282 | Secondary | Requires Improvement | 35.3% | 1,378 |
| Tulip Academy142667 | Not applicable | Outstanding | 51.2% | 238 |
| Tudor Lodge Therapeutic School150738 | Not applicable | — | — | 31 |
| Toynton All Saints Primary School120483 | Primary | Requires Improvement | 18.9% | 132 |
| Tower Road Academy136793 | Primary | Good | 18.4% | 559 |
| Thurlby Community Primary Academy147153 | Primary | Good | 24.9% | 213 |
| Three Chestnuts151553 | Not applicable | — | — | 11 |
| Thomas Middlecott Academy141391 | Secondary | Requires Improvement | 41.5% | 612 |
| Theddlethorpe Academy143132 | Primary | Good | 46.7% | 98 |
| The Willows School152281 | Not applicable | — | — | 0 |
| The Welbourn Church of England Primary School120542 | Primary | Good | 29.5% | 78 |
| The Wainfleet Magdalen Church of England/Methodist School140185 | Primary | Good | 61.8% | 165 |
| The Uffington Church of England Primary School120541 | Primary | Good | 12.0% | 83 |
| The Tydd St Mary Church of England Primary School120614 | Primary | Outstanding | 22.9% | 109 |
| The St Sebastian's Church of England Primary School, Great Gonerby120601 | Primary | Good | 23.9% | 155 |