| Old Heath Community Primary School114710 | Primary | Good | 21.8% | 213 |
| Omnia Foundation147704 | Not applicable | — | — | 22 |
| Ongar Primary School146230 | Primary | Good | 34.1% | 176 |
| Open Box Education Centre144818 | Not applicable | — | — | 10 |
| Ormiston Rivers Academy137152 | Secondary | Good | 16.3% | 1,077 |
| Our Lady Immaculate Catholic Primary School138105 | Primary | Good | 8.3% | 217 |
| Our Lady of Ransom Catholic Primary School145996 | Primary | Good | 9.0% | 422 |
| Parkwood Academy141355 | Primary | Requires Improvement | 38.1% | 210 |
| Parsons Heath Church of England Voluntary Controlled Primary School115088 | Primary | Good | 41.1% | 197 |
| Passmores Academy137445 | Secondary | Good | 28.2% | 1,205 |
| Paxman Academy147080 | Secondary | Good | 29.7% | 886 |
| Pear Tree Mead Academy141304 | Primary | Good | 26.2% | 483 |
| Pemberley Academy140380 | Primary | Good | 26.4% | 208 |
| Perryfields Infant School145988 | Primary | Good | 4.4% | 180 |
| Perryfields Junior School143784 | Primary | Outstanding | 9.3% | 301 |
| Philip Morant School and College146794 | Secondary | Good | 25.9% | 1,828 |
| Plume School137790 | Secondary | Good | 24.9% | 1,786 |
| Poplar Adolescent Unit135778 | Not applicable | Good | 0.0% | 0 |
| Potter Street Academy139802 | Primary | Good | 33.3% | 198 |
| Prettygate Infant School114744 | Primary | Good | 13.0% | 177 |
| Prettygate Junior School114743 | Primary | Good | 15.4% | 254 |
| Priory Primary School, Bicknacre115000 | Primary | Requires Improvement | 12.0% | 142 |
| Purford Green Primary School139950 | Primary | Good | 26.2% | 227 |
| Purleigh Community Primary School140744 | Primary | Good | 10.7% | 206 |
| Queen Boudica Primary School135585 | Primary | Good | 16.7% | 407 |
| Quilters Infant School114884 | Primary | Outstanding | 3.3% | 180 |
| Quilters Junior School114801 | Primary | Outstanding | 6.0% | 267 |
| R A Butler Infant School136325 | Primary | Good | 8.9% | 271 |
| R A Butler Junior School136328 | Primary | Outstanding | 11.5% | 384 |
| Radwinter Church of England Voluntary Aided Primary School115191 | Primary | Good | 7.2% | 138 |
| Ramsden Hall Academy142612 | Not applicable | Good | 66.7% | 99 |
| Ravens Academy139641 | Primary | Good | 70.4% | 302 |
| Rayleigh Primary School139543 | Primary | Good | 17.5% | 463 |
| Rayne Primary and Nursery School145407 | Primary | Good | 10.8% | 215 |
| Rettendon Primary School151675 | Primary | Good | — | — |
| Richard de Clare Community Academy143204 | Primary | Good | 32.1% | 364 |
| Rickling Church of England Voluntary Aided Primary School115130 | Primary | Good | 2.2% | 91 |
| Ridgewell Church of England Primary School144645 | Primary | Good | 33.3% | 57 |
| Rivenhall Church of England Primary School146106 | Primary | Good | 15.4% | 123 |
| Riverside Primary School135903 | Primary | Good | 14.9% | 397 |
| Roach Vale Primary School114823 | Primary | Good | 39.1% | 192 |
| Rochford Primary and Nursery School140747 | Primary | Good | 33.2% | 244 |
| Roding Valley High School145597 | Secondary | Good | 19.5% | 1,437 |
| Rodings Primary School115266 | Primary | Good | 10.1% | 286 |
| Rolph Church of England Primary School and Nursery140506 | Primary | Good | 13.5% | 230 |
| Roseacres Primary School141681 | Primary | Good | 19.4% | 211 |
| Roxwell Church of England Primary School147444 | Primary | Good | 20.0% | 85 |
| Roydon Primary Academy139399 | Primary | Good | 12.5% | 192 |
| Runwell Community Primary School137054 | Primary | Requires Improvement | 20.7% | 419 |
| Ryedene Primary and Nursery School143127 | Primary | Good | 39.8% | 425 |