| Burrsville Infant Academy139808 | Primary | Good | 24.4% | 176 |
| Buttsbury Primary School136734 | Primary | Outstanding | 4.6% | 856 |
| Cambian Great Dunmow School149357 | Not applicable | — | — | 10 |
| Camulos Academy141950 | Primary | Good | 17.2% | 413 |
| Canewdon Church of England Primary School149618 | Primary | Requires Improvement | 19.8% | 101 |
| Cann Hall Primary School138911 | Primary | Good | 21.9% | 416 |
| Canvey Island Infant School and Nursery114980 | Primary | Good | 17.3% | 203 |
| Canvey Junior School114822 | Primary | Good | 20.7% | 241 |
| Castle View School147031 | Secondary | Requires Improvement | 27.4% | 1,054 |
| Castledon School141765 | Not applicable | Outstanding | 36.2% | 238 |
| Cedar Hall School115457 | Not applicable | Requires Improvement | 31.7% | 186 |
| Chancellor Park Primary School, Chelmsford133661 | Primary | Outstanding | 9.0% | 210 |
| Chapel Hill Primary School & Nursery150736 | Primary | — | 5.3% | 206 |
| Chappel CofE Controlled Primary School150123 | Primary | Inadequate | 4.5% | 89 |
| Chase Lane Primary School and Nursery115301 | Primary | Good | 28.5% | 449 |
| Chatten Free School148543 | Not applicable | Outstanding | 25.0% | 75 |
| Chelmer Valley High School137260 | Secondary | Good | 18.7% | 1,155 |
| Chelmsford College130679 | 16 plus | — | — | — |
| Chelmsford County High School for Girls136412 | Secondary | Outstanding | 4.2% | 1,236 |
| Chelmsford Hospital School142537 | Not applicable | — | — | 0 |
| Cherry Tree Academy142002 | Primary | Good | 31.6% | 171 |
| Cherry Tree Primary School143452 | Primary | Requires Improvement | 41.0% | 423 |
| Chigwell Primary Academy141869 | Primary | Good | 10.2% | 186 |
| Chigwell Row Infant School145993 | Primary | Good | 34.2% | 38 |
| Chigwell School115392 | Not applicable | — | — | 1,111 |
| Children's Support Service136035 | Not applicable | Good | 40.7% | 91 |
| Chipping Hill Primary School114827 | Primary | Good | 9.8% | 419 |
| Chipping Ongar Primary School146195 | Primary | Good | 11.7% | 205 |
| Chrishall Holy Trinity and St Nicholas CofE (Aided) Primary School and Pre-School115195 | Primary | Good | 1.6% | 126 |
| Christchurch Church of England Primary School142252 | Primary | Requires Improvement | 30.3% | 122 |
| Church Langley Community Primary School131209 | Primary | Good | 7.8% | 436 |
| Churchgate Church of England Voluntary Aided Primary School, Harlow115170 | Primary | Good | 23.7% | 194 |
| Clacton County High School138084 | Secondary | Good | 33.4% | 1,854 |
| Clarity Independent School146804 | Not applicable | — | — | 13 |
| Clavering Primary School114967 | Primary | Good | 6.0% | 182 |
| Colchester Academy136195 | Secondary | Good | 40.8% | 899 |
| Colchester County High School for Girls137515 | Secondary | Outstanding | 2.7% | 1,210 |
| Colchester Institute130674 | 16 plus | — | — | — |
| Colchester Prep & High School115409 | Not applicable | — | — | 281 |
| Colchester Royal Grammar School149899 | Secondary | Inadequate | 4.5% | 1,059 |
| Cold Norton Primary School114904 | Primary | Good | 7.0% | 157 |
| Collingwood Primary School115305 | Primary | Good | 17.6% | 227 |
| Colne Community School146795 | Secondary | Good | 19.8% | 1,283 |
| Colne Engaine Church of England Primary School146923 | Primary | Good | 4.8% | 105 |
| Community College Initiative Ltd144787 | Not applicable | — | — | — |
| Compass Community School Essex147473 | Not applicable | — | — | 16 |
| Cooks Spinney Primary Academy and Nursery140024 | Primary | Good | 51.2% | 459 |
| Coopersale and Theydon Garnon Church of England Voluntary Controlled Primary School115095 | Primary | Good | 20.0% | 200 |
| Coopersale Hall School115435 | Not applicable | — | — | 266 |
| Copford Church of England Voluntary Controlled Primary School115074 | Primary | Good | 4.4% | 206 |