| Garston Manor School117667 | Not applicable | Good | 39.4% | 175 |
| George Street Primary School117106 | Primary | Needs attention | 26.5% | 224 |
| Giles Junior School117306 | Primary | Good | 22.3% | 346 |
| Goffs - Churchgate Academy145297 | Secondary | Good | 34.2% | 582 |
| Goffs Academy137532 | Secondary | Good | 20.1% | 1,574 |
| Goffs Oak Primary & Nursery School117243 | Primary | Good | 6.9% | 235 |
| Goldfield Infants' and Nursery School117274 | Primary | Good | 5.9% | 222 |
| Gracewood Academy152099 | Secondary | Requires Improvement | 29.0% | 420 |
| Graveley Primary School117395 | Primary | Good | 15.5% | 84 |
| Great Gaddesden Church of England Primary School117433 | Primary | Expected standard | 16.5% | 80 |
| Green Lanes Primary School117105 | Primary | Good | 12.1% | 413 |
| Greenfield Nursery School117067 | Nursery | Good | 0.0% | 105 |
| Greenfields Primary School117193 | Primary | Good | 22.3% | 212 |
| Greenside School117690 | Not applicable | Good | 34.5% | 197 |
| Greenway Primary and Nursery School117276 | Primary | Good | 0.9% | 229 |
| Grove Road Primary School145255 | Primary | Good | 6.6% | 443 |
| Gurukula - the Hare Krishna Primary School117654 | Not applicable | — | — | 54 |
| Haberdashers' Boys' School117648 | Not applicable | — | — | 1,429 |
| Haberdashers' Girls' School117649 | Not applicable | — | — | 1,118 |
| Hailey Hall School142257 | Not applicable | Good | 56.8% | 81 |
| Haileybury College117607 | Not applicable | — | — | 924 |
| Haileybury Turnford142051 | Secondary | Good | 34.5% | 1,021 |
| Hammond Academy137238 | Primary | Good | 29.7% | 308 |
| Harpenden Academy143648 | Primary | Good | 5.1% | 216 |
| Hartsbourne Primary School145256 | Primary | Good | 5.7% | 195 |
| Hartsfield Junior Mixed and Infant School117376 | Primary | Good | 9.3% | 409 |
| Harvey Road Primary School117131 | Primary | Outstanding | 4.0% | 240 |
| Harwood Hill Junior Mixed Infant and Nursery School117227 | Primary | Good | 29.6% | 179 |
| Hatfield Community Free School138201 | Primary | Good | 24.1% | 406 |
| Haywood Grove School131319 | Not applicable | Good | 80.6% | 62 |
| Heath Lane Nursery School117070 | Nursery | Good | 0.0% | 68 |
| Heath Mount School117621 | Not applicable | — | — | 503 |
| Heathlands School117685 | Not applicable | Outstanding | 35.8% | 150 |
| Hertford Heath Primary and Nursery School117125 | Primary | Good | 14.5% | 207 |
| Hertford Prep117629 | Not applicable | — | — | 130 |
| Hertford Regional College130722 | 16 plus | — | — | — |
| Hertford St Andrew CofE Primary School117397 | Primary | Good | 47.3% | 156 |
| Hertingfordbury Cowper Primary School117563 | Primary | Good | 2.9% | 229 |
| Hertsmere Jewish Primary School147283 | Primary | Good | 3.1% | 422 |
| Hertswood Academy138747 | Secondary | Good | 33.3% | 1,144 |
| High Beeches Primary School117342 | Primary | Outstanding | 3.3% | 420 |
| High Leigh Primary School117270 | Primary | Requires Improvement | 37.0% | 166 |
| High Wych Church of England Primary School117398 | Primary | Good | 14.2% | 224 |
| Highbury Infant School and Nursery117113 | Primary | Good | 9.3% | 195 |
| Highover Junior Mixed and Infant School117115 | Primary | Outstanding | 5.8% | 433 |
| Highwood Primary School117089 | Primary | Good | 19.8% | 445 |
| Hillmead Primary School117310 | Primary | Good | 20.1% | 223 |
| Hillshott Infant School and Nursery117123 | Primary | Good | 20.6% | 202 |
| Hitchin Boys' School139154 | Secondary | Strong standard | 8.8% | 1,364 |
| Hitchin Girls' School137288 | Secondary | Outstanding | 7.1% | 1,357 |