SchoolScoresBest secondary schools in Sutton
How this list works. Ranked by the percentage of pupils achieving grade 5 or above in both English and maths GCSE, averaged over up to the last three years and weighted by the number of pupils each year. Only years with at least 10 pupils count, and a school needs at least one such year to be ranked. Independent schools, special schools and alternative provision are not ranked because their results aren't comparable. Ofsted outcomes are shown alongside but are not part of the ranking. Full methodology.
| # | School | Result |
|---|---|---|
| 1 | Sutton Grammar School Ofsted: Good (2022) · Grammar school (selective) | 100% |
| 2 | Wallington High School for Girls Ofsted: No overall grade (2025) · Grammar school (selective) | 100% |
| 3 | Wilson's School Ofsted: Outstanding (2022) · Grammar school (selective) | 100% |
| 4 | Nonsuch High School for Girls Ofsted: Report card 2026: 1 exceptional, 6 strong · Grammar school (selective) | 99% |
| 5 | Wallington County Grammar School Ofsted: Outstanding (2017), confirmed 2022 · Grammar school (selective) | 99% |
| 6 | Harris Academy Sutton Ofsted: Outstanding (2023) | 75% |
| 7 | Glenthorne High School Ofsted: Report card 2026: 2 exceptional, 5 strong | 75% |
| 8 | Greenshaw High School Ofsted: No overall grade (2024) | 70% |
| 9 | The John Fisher School Ofsted: Good (2013), confirmed 2023 | 65% |
| 10 | St Philomena's Catholic High School for Girls Ofsted: Good (2022) | 63% |
| 11 | Cheam High School Ofsted: No overall grade (2025) | 58% |
| 12 | Carshalton High School for Girls Ofsted: Good (2017), confirmed 2023 | 57% |
| 13 | Carshalton Boys Sports College Ofsted: Good (2022) | 41% |
| 14 | Oaks Park High School Ofsted: Good (2023) | 38% |
| 15 | Overton Grange School Ofsted: No overall grade (2024) | 38% |
Result: grade 5 or above in English and maths. Source: DfE school performance tables to 2025; Ofsted inspection data.
Page updated 26 September 2026.