| High Beeches Primary School117342 | Primary | Outstanding | 4.3% | 418 |
| Hertswood Academy138747 | Secondary | Good | 33.1% | 1,173 |
| Hertsmere Jewish Primary School147283 | Primary | Good | 3.4% | 407 |
| Hertingfordbury Cowper Primary School117563 | Primary | Good | 2.9% | 225 |
| Hertford St Andrew CofE Primary School117397 | Primary | Good | 46.9% | 142 |
| Hertford Regional College130722 | 16 plus | — | — | — |
| Hertford Prep117629 | Not applicable | — | — | 137 |
| Hertford Heath Primary and Nursery School117125 | Primary | Good | 17.4% | 196 |
| Heathlands School117685 | Not applicable | Outstanding | 33.8% | 153 |
| Heath Mount School117621 | Not applicable | — | — | 505 |
| Heath Lane Nursery School117070 | Nursery | Good | 0.0% | 69 |
| Haywood Grove School131319 | Not applicable | Good | 65.0% | 60 |
| Hatfield Community Free School138201 | Primary | Good | 22.5% | 418 |
| Harwood Hill Junior Mixed Infant and Nursery School117227 | Primary | Good | 27.8% | 181 |
| Harvey Road Primary School117131 | Primary | Outstanding | 3.1% | 240 |
| Hartsfield Junior Mixed and Infant School117376 | Primary | Good | 8.5% | 410 |
| Hartsbourne Primary School145256 | Primary | Good | 6.9% | 190 |
| Harpenden Academy143648 | Primary | Good | 6.5% | 214 |
| Hammond Academy137238 | Primary | Good | 28.4% | 344 |
| Haileybury Turnford142051 | Secondary | Good | 30.9% | 967 |
| Haileybury College117607 | Not applicable | — | — | 916 |
| Hailey Hall School142257 | Not applicable | Good | 60.2% | 83 |
| Haberdashers' Girls' School117649 | Not applicable | — | — | 1,132 |
| Haberdashers' Boys' School117648 | Not applicable | — | — | 1,457 |
| Gurukula - the Hare Krishna Primary School117654 | Not applicable | — | — | 60 |
| Grove Road Primary School145255 | Primary | Good | 7.1% | 454 |
| Greenway Primary and Nursery School117276 | Primary | Good | 1.8% | 230 |
| Greenside School117690 | Not applicable | Good | 33.3% | 190 |
| Greenfields Primary School117193 | Primary | Good | 21.4% | 216 |
| Greenfield Nursery School117067 | Nursery | Good | 0.0% | 117 |
| Green Lanes Primary School117105 | Primary | Good | 11.8% | 417 |
| Great Gaddesden Church of England Primary School117433 | Primary | Good | 24.3% | 76 |
| Graveley Primary School117395 | Primary | Good | 13.3% | 98 |
| Gracewood Academy152099 | Secondary | Requires Improvement | — | — |
| Goldfield Infants' and Nursery School117274 | Primary | Good | 7.1% | 213 |
| Goffs Oak Primary & Nursery School117243 | Primary | Good | 7.7% | 240 |
| Goffs Academy137532 | Secondary | Good | 18.7% | 1,606 |
| Goffs - Churchgate Academy145297 | Secondary | Good | 33.6% | 599 |
| Giles Junior School117306 | Primary | Good | 24.3% | 329 |
| George Street Primary School117106 | Primary | Good | 19.4% | 230 |
| Garston Manor School117667 | Not applicable | Good | 41.7% | 163 |
| Garden Fields Junior Mixed and Infant School148434 | Primary | Good | 14.2% | 480 |
| Garden City Academy138389 | Primary | Good | 46.2% | 171 |
| Galley Hill Primary School and Nursery135224 | Primary | Good | 31.1% | 432 |
| Gade Valley Primary School117249 | Primary | Good | 12.9% | 224 |
| Gaddesden Row Jmi School117101 | Primary | Good | 28.6% | 49 |
| Future Academies Watford135876 | Secondary | Good | 34.2% | 1,018 |
| Furneux Pelham Church of England School117394 | Primary | Good | 13.3% | 83 |
| Freman College137002 | Secondary | Good | 11.3% | 1,022 |
| Four Swannes Primary School117092 | Primary | Requires Improvement | 34.0% | 201 |