- A: A to Z of records
- B: A to Z of records
- C: A to Z of records
- D: A to Z of records
- E: A to Z of records
- F: A to Z of records
- G: A to Z of records
- H: A to Z of records
- K: A to Z of records
- L: A to Z of records
- M: A to Z of records
- N: A to Z of records
- O: A to Z of records
- P: A to Z of records
- R: A to Z of records
- S: A to Z of records
- T: A to Z of records
- U: A to Z of records
- V: A to Z of records
- W: A to Z of records
- Sacred Heart Catholic Primary School and Nursery
- Saint Pierre School
- SENDIASS Southend
- Shoeburyness High School
- Silverbirch Animal Therapy
- South Essex College Colleges Group
- Southchurch High School
- Southend Adult Community College
- Southend High School for Boys
- Southend High School for Girls
- Southend Virtual School
- Southend YMCA Community School
- Specialist Teaching Service (Southend-on-Sea City Council)
- St Piers School and College
- St. Bernard's High School
- St. George's Catholic Primary School
- St. Helen's Catholic Primary School
- St. Mary's Prittlewell C of E Primary School
- St. Michael's School Church of England Preparatory School
- St. Nicholas School
- St. Thomas More High School
- Strategy Education
- Sutton House Academy (PLT Southend)