| Moss Bury Primary School and Nursery117269 | Primary | Good | 27.1% | 245 |
| Mount Pleasant Lane Primary School145969 | Primary | Good | 12.6% | 206 |
| Muriel Green Nursery School133975 | Nursery | Good | 0.0% | 71 |
| Nascot Wood Infant and Nursery School117374 | Primary | Good | 2.0% | 210 |
| Nascot Wood Junior School117311 | Primary | Outstanding | 11.7% | 240 |
| Nash Mills Church of England Primary School117418 | Primary | Good | 13.3% | 225 |
| Newberries Primary School117303 | Primary | Good | 9.6% | 198 |
| Nicholas Breakspear Catholic School137938 | Secondary | Outstanding | 12.0% | 1,097 |
| North Hertfordshire College130721 | 16 plus | — | — | — |
| North Herts Education Support Centre130344 | Not applicable | Outstanding | 0.0% | 0 |
| Northaw Church of England Primary School117569 | Primary | Good | 11.6% | 101 |
| Northfields Infants and Nursery School117223 | Primary | Requires Improvement | 27.5% | 151 |
| Northgate Primary School138539 | Primary | Good | 4.2% | 449 |
| Norton St Nicholas CofE (va) Primary School117442 | Primary | Good | 10.8% | 233 |
| Oak View Primary and Nursery School135223 | Primary | Good | 26.5% | 430 |
| Oaklands College130723 | 16 plus | — | — | — |
| Oaklands Primary School117261 | Primary | Good | 5.8% | 190 |
| Oakleaf Primary151385 | Primary | — | 35.2% | 225 |
| Oakmere Primary School117371 | Primary | Good | 36.3% | 247 |
| Oakview Primary School150844 | Primary | Requires Improvement | 42.6% | 170 |
| Oakwood Primary School117222 | Primary | Good | 7.7% | 313 |
| Offley Endowed Primary School and Nursery117445 | Primary | Good | 20.1% | 166 |
| Onslow St Audrey's School147535 | Secondary | Good | 31.5% | 807 |
| Oughton Primary and Nursery School133323 | Primary | Good | 47.5% | 202 |
| Our Lady Catholic Primary School117464 | Primary | Good | 19.0% | 208 |
| Our Lady Catholic Primary School138322 | Primary | Good | 18.7% | 166 |
| Oxhey Nursery School117077 | Nursery | Good | 0.0% | 68 |
| Oxhey Wood Primary School144906 | Primary | Good | 30.0% | 396 |
| Panshanger Primary School117294 | Primary | Good | 8.9% | 238 |
| Park Street Church of England Voluntary Aided Primary School117452 | Primary | Good | 22.2% | 147 |
| Parkgate Infants' and Nursery School117163 | Primary | Good | 5.2% | 205 |
| Parkgate Junior School117162 | Primary | Outstanding | 13.9% | 238 |
| Parkside Community Primary School117562 | Primary | Good | 42.1% | 246 |
| Parmiter's School136899 | Secondary | Outstanding | 7.7% | 1,464 |
| Peartree Primary School148989 | Primary | Good | 36.9% | 187 |
| Peartree Spring Primary School117206 | Primary | Good | 17.6% | 625 |
| Peartree Way Nursery School117080 | Nursery | Good | 0.0% | 105 |
| Pinewood School141251 | Not applicable | Requires Improvement | 46.6% | 209 |
| Pirton School117128 | Primary | Requires Improvement | 17.8% | 135 |
| Pixies Hill Primary School117256 | Primary | Good | 11.4% | 210 |
| Pixmore Junior School117259 | Primary | Good | 30.4% | 240 |
| Ponsbourne St Mary's Church of England Primary School117396 | Primary | Good | 6.5% | 112 |
| Pope Paul Catholic Primary School151984 | Primary | Good | — | — |
| Potten End CofE Primary School117414 | Primary | Good | 15.2% | 204 |
| Prae Wood Primary School117315 | Primary | Good | 3.2% | 448 |
| Presdales School137985 | Secondary | Outstanding | 9.0% | 1,166 |
| Preston Primary School117403 | Primary | Good | 2.9% | 68 |
| Priors Wood Primary School117271 | Primary | Good | 16.9% | 222 |
| Puller Memorial, Church of England, Voluntary Aided Primary School117453 | Primary | Good | 20.0% | 55 |
| Purwell Primary School117224 | Primary | Good | 34.2% | 163 |