| Reepham Church of England Primary School120581 | Primary | Good | 6.7% | 195 |
| Ruskington Chestnut Street Church of England Academy138324 | Primary | Good | 34.5% | 154 |
| Saint Mary's Catholic Voluntary Academy146226 | Primary | Requires Improvement | 23.0% | 183 |
| Saint Mary's RC Primary Academy Boston146241 | Primary | Good | 15.9% | 189 |
| Saxilby Church of England Primary School120583 | Primary | Good | 19.8% | 354 |
| Scamblesby Church of England Primary School120584 | Primary | Good | 41.3% | 46 |
| Scampton Church of England Primary School120585 | Primary | Expected standard | 20.3% | 64 |
| Scotter Primary School120473 | Primary | Expected standard | 12.6% | 247 |
| Seathorne Primary Academy147412 | Primary | Good | 49.1% | 285 |
| Shepeau Stow Primary School120422 | Primary | Requires Improvement | 31.0% | 58 |
| Sir Francis Hill Community Primary School120427 | Primary | Requires Improvement | 28.7% | 562 |
| Sir Robert Pattinson Academy137135 | Secondary | Good | 20.8% | 1,310 |
| Sir William Robertson Academy, Welbourn138839 | Secondary | Good | 23.4% | 1,015 |
| Skegness Academy136217 | Secondary | Requires Improvement | 66.7% | 939 |
| Skegness Grammar School138757 | Secondary | Good | 30.6% | 622 |
| Skegness Infant Academy138750 | Primary | Good | 49.0% | 260 |
| Skegness Junior Academy138442 | Primary | Good | 68.9% | 318 |
| Skellingthorpe the Holt Primary School120400 | Primary | Good | 20.8% | 192 |
| Sleaford Joint Sixth Form132951 | Not applicable | — | — | — |
| Somercotes Academy142392 | Secondary | Good | 48.0% | 395 |
| South View Community Primary School120406 | Primary | Good | 22.2% | 427 |
| South Witham Academy143518 | Primary | Good | 45.0% | 90 |
| Spalding Academy144488 | Secondary | Good | 30.4% | 1,486 |
| Spalding Grammar School139304 | Secondary | Good | 8.1% | 1,023 |
| Spalding High School120642 | Secondary | Outstanding | 13.5% | 970 |
| Spalding Parish Church of England Day School147520 | Primary | Good | 29.8% | 537 |
| Spalding Primary Academy148373 | Primary | Good | 19.9% | 407 |
| Spilsby Primary School142764 | Primary | Requires Improvement | 40.6% | 175 |
| Springwell Alternative Academy Grantham147197 | Not applicable | Good | 77.3% | 44 |
| Springwell Alternative Academy Lincoln147195 | Not applicable | Good | 78.6% | 84 |
| Springwell Alternative Academy Mablethorpe147196 | Not applicable | Outstanding | 81.6% | 49 |
| Springwell Alternative Academy Spalding144763 | Not applicable | Outstanding | 77.6% | 49 |
| St Andrew's CofE Primary School138487 | Primary | Good | 13.9% | 292 |
| St Anne's Church of England Primary School, Grantham120522 | Primary | Good | 25.5% | 208 |
| St Augustine's Catholic Voluntary Academy139626 | Primary | Good | 45.6% | 103 |
| St Bartholomews CofE Primary School120551 | Primary | Requires Improvement | 36.5% | 85 |
| St Bernard's School142309 | Not applicable | Good | 67.0% | 115 |
| St Botolph's C of E Primary School132251 | Primary | Good | 18.9% | 402 |
| St George's Academy136044 | Secondary | Good | 34.0% | 2,281 |
| St George's Church of England Aided Primary School120607 | Primary | Good | 47.9% | 144 |
| St George's Church of England Community Primary School, Gainsborough131490 | Primary | Good | 72.0% | 189 |
| St Giles Academy146561 | Primary | Urgent improvement | 59.0% | 371 |
| St Helena's Church of England Primary Academy, Willoughby152023 | Primary | Good | 20.0% | 145 |
| St Hugh's Catholic Primary, A Voluntary Academy139627 | Primary | Good | 27.7% | 267 |
| St Hugh's School120732 | Not applicable | — | — | 180 |
| St Lawrence Church of England Primary School120537 | Primary | Good | 14.3% | 196 |
| St Lawrence School142308 | Not applicable | Good | 64.8% | 179 |
| St Michael's Church of England School, Louth120574 | Primary | Good | 37.1% | 291 |
| St Nicholas CE Primary Academy147447 | Primary | Good | 42.2% | 187 |
| St Norbert's Catholic Voluntary Academy146257 | Primary | Good | 27.0% | 204 |