S
- SEEVIC College
- Saffron Walden County High School
- The Sandon School
- Sawyers Hall College of Science and Technology
- Shenfield High School
- Sixth Form College Colchester
- St Benedict's Catholic College
- St Helena School
- St John Payne Catholic Comprehensive School, Chelmsford
- St John's Church of England Voluntary Controlled School
- St John's RC School
- St John's School (IND)
- St Mark's West Essex Catholic School
- St Martin's School
- St Mary's School (IND)
- St Nicholas School (IND)
- St Peter's High School and Technology College
- St Peters College
- Stanway School
- Stewards School
- The Sweyne Park School
Read more about this topic: List Of Schools In Essex