| Doucecroft School115426 | Not applicable | — | — | 83 |
| Doddinghurst Infant School114969 | Primary | Good | 11.3% | 177 |
| Doddinghurst Church of England Junior School146920 | Primary | Good | 20.2% | 223 |
| Dedham Church of England Voluntary Controlled Primary School115076 | Primary | Good | 8.4% | 202 |
| Debden Park High School136555 | Secondary | Good | 19.6% | 1,046 |
| Debden Church of England Voluntary Controlled Primary Academy143855 | Primary | Good | 9.3% | 140 |
| de Vere Primary School148139 | Primary | Good | 24.6% | 203 |
| De la Salle School115237 | Secondary | Good | 22.5% | 761 |
| Davenant Foundation School136625 | Secondary | Strong standard | 8.9% | 1,199 |
| Danbury Park Community Primary School114992 | Primary | Good | 4.8% | 250 |
| Daiglen School115400 | Not applicable | — | — | 95 |
| Cressing Primary School148306 | Primary | Good | 19.5% | 205 |
| Crays Hill Primary School145772 | Primary | Good | 85.4% | 82 |
| Copford Church of England Voluntary Controlled Primary School115074 | Primary | Expected standard | 4.0% | 202 |
| Coopersale Hall School115435 | Not applicable | — | — | 302 |
| Coopersale and Theydon Garnon Church of England Voluntary Controlled Primary School115095 | Primary | Good | 17.8% | 208 |
| Cooks Spinney Primary Academy and Nursery140024 | Primary | Good | 46.3% | 443 |
| Compass Community School Essex147473 | Not applicable | — | — | 16 |
| Community College Initiative Ltd144787 | Not applicable | — | — | — |
| Colne Engaine Church of England Primary School146923 | Primary | Good | 8.0% | 88 |
| Colne Community School146795 | Secondary | Good | 21.7% | 1,289 |
| Collingwood Primary School115305 | Primary | Expected standard | 14.4% | 208 |
| Cold Norton Primary School114904 | Primary | Good | 7.6% | 157 |
| Colchester Royal Grammar School149899 | Secondary | Inadequate | 4.7% | 1,073 |
| Colchester Prep & High School115409 | Not applicable | — | — | 280 |
| Colchester Institute130674 | 16 plus | — | — | — |
| Colchester County High School for Girls137515 | Secondary | Outstanding | 2.5% | 1,198 |
| Colchester Academy136195 | Secondary | Good | 42.1% | 879 |
| Clavering Primary School114967 | Primary | Good | 3.9% | 179 |
| Clarity Independent School146804 | Not applicable | — | — | 13 |
| Clacton County High School138084 | Secondary | Good | 36.8% | 1,886 |
| Churchgate Church of England Voluntary Aided Primary School, Harlow115170 | Primary | Good | 14.6% | 192 |
| Church Langley Community Primary School131209 | Primary | Good | 10.8% | 406 |
| Christchurch Church of England Primary School142252 | Primary | Needs attention | 31.2% | 109 |
| Chrishall Holy Trinity and St Nicholas CofE (Aided) Primary School and Pre-School115195 | Primary | Good | 2.4% | 124 |
| Chipping Ongar Primary School146195 | Primary | Good | 13.5% | 208 |
| Chipping Hill Primary School114827 | Primary | Good | 9.7% | 421 |
| Children's Support Service136035 | Not applicable | Good | 46.1% | 102 |
| Chigwell School115392 | Not applicable | — | — | 1,135 |
| Chigwell Row Infant School145993 | Primary | Good | 25.9% | 27 |
| Chigwell Primary Academy141869 | Primary | Good | 15.0% | 200 |
| Cherry Tree Primary School143452 | Primary | Requires Improvement | 44.5% | 384 |
| Cherry Tree Academy142002 | Primary | Good | 38.3% | 180 |
| Chelmsford Hospital School142537 | Not applicable | — | — | 1 |
| Chelmsford County High School for Girls136412 | Secondary | Outstanding | 5.3% | 1,275 |
| Chelmsford College130679 | 16 plus | — | — | — |
| Chelmer Valley High School137260 | Secondary | Good | 23.2% | 1,200 |
| Chatten Free School148543 | Not applicable | Outstanding | 28.4% | 75 |
| Chase Lane Primary School and Nursery115301 | Primary | Good | 29.5% | 445 |
| Chappel CofE Controlled Primary School150123 | Primary | Inadequate | 3.7% | 82 |