| Pixies Hill Primary School117256 | Primary | Good | 12.9% | 209 |
| Pirton School117128 | Primary | Requires Improvement | 14.0% | 136 |
| Pinewood School141251 | Not applicable | Requires Improvement | 47.1% | 206 |
| Peartree Way Nursery School117080 | Nursery | Good | 0.0% | 98 |
| Peartree Spring Primary School117206 | Primary | Good | 16.6% | 626 |
| Peartree Primary School148989 | Primary | Good | 34.8% | 184 |
| Parmiter's School136899 | Secondary | Outstanding | 6.7% | 1,496 |
| Parkside Community Primary School117562 | Primary | Good | 46.2% | 213 |
| Parkgate Junior School117162 | Primary | Outstanding | 14.8% | 236 |
| Parkgate Infants' and Nursery School117163 | Primary | Good | 4.3% | 202 |
| Park Street Church of England Voluntary Aided Primary School117452 | Primary | Good | 22.5% | 153 |
| Panshanger Primary School117294 | Primary | Good | 11.5% | 240 |
| Oxhey Wood Primary School144906 | Primary | Good | 27.6% | 387 |
| Oxhey Nursery School117077 | Nursery | Good | 10.7% | 84 |
| Our Lady Catholic Primary School117464 | Primary | Expected standard | 16.9% | 204 |
| Our Lady Catholic Primary School138322 | Primary | Good | 16.2% | 173 |
| Oughton Primary and Nursery School133323 | Primary | Good | 42.8% | 195 |
| Onslow St Audrey's School147535 | Secondary | Good | 32.4% | 787 |
| Offley Endowed Primary School and Nursery117445 | Primary | Good | 16.9% | 159 |
| Oakwood Primary School117222 | Primary | Good | 8.5% | 317 |
| Oakview Primary School150844 | Primary | Requires Improvement | 45.3% | 188 |
| Oakmere Primary School117371 | Primary | Good | 35.6% | 226 |
| Oakleaf Primary151385 | Primary | — | 31.5% | 187 |
| Oaklands Primary School117261 | Primary | Good | 4.6% | 195 |
| Oaklands College130723 | 16 plus | — | — | — |
| Oak View Primary and Nursery School135223 | Primary | Good | 24.9% | 395 |
| Norton St Nicholas CofE (va) Primary School117442 | Primary | Good | 11.7% | 222 |
| Northgate Primary School138539 | Primary | Good | 5.3% | 455 |
| Northfields Infants and Nursery School117223 | Primary | Requires Improvement | 23.5% | 138 |
| Northaw Church of England Primary School117569 | Primary | Good | 14.4% | 101 |
| North Herts Education Support Centre130344 | Not applicable | Outstanding | 50.0% | 4 |
| North Hertfordshire College130721 | 16 plus | — | — | — |
| Nicholas Breakspear Catholic School137938 | Secondary | Outstanding | 11.5% | 1,134 |
| Newberries Primary School117303 | Primary | Good | 10.1% | 188 |
| Nash Mills Church of England Primary School117418 | Primary | Good | 12.2% | 235 |
| Nascot Wood Junior School117311 | Primary | Outstanding | 9.2% | 240 |
| Nascot Wood Infant and Nursery School117374 | Primary | Good | 4.1% | 202 |
| Muriel Green Nursery School133975 | Nursery | Good | 16.9% | 65 |
| Mount Pleasant Lane Primary School145969 | Primary | Good | 16.9% | 200 |
| Moss Bury Primary School and Nursery117269 | Primary | Good | 25.7% | 226 |
| Morgans Primary School & Nursery117363 | Primary | Good | 15.2% | 346 |
| Monksmead School117219 | Primary | Good | 18.8% | 208 |
| Monk's Walk School138632 | Secondary | Good | 19.7% | 1,440 |
| Millfield First and Nursery School117309 | Primary | Good | 8.8% | 311 |
| Millbrook School117379 | Primary | Requires Improvement | 35.0% | 160 |
| Mill Mead Primary Academy150620 | Primary | Good | 6.0% | 216 |
| Middleton School117676 | Not applicable | Outstanding | 35.4% | 113 |
| Micklem Primary School117231 | Primary | Good | 37.4% | 223 |
| Meryfield Primary School145351 | Primary | Good | 20.7% | 450 |
| Merry Hill Infant School and Nursery117090 | Primary | Good | 12.3% | 166 |