Windsor and Maidenhead independent schools league table 2025
Fee-paying schools, scored only where they publish results in the performance tables. Ranked by the Success Index (England) from official English data; 5 schools in Windsor and Maidenhead, South East. Rank positions shown on each profile are within England and South East.
- Primary Schools in Windsor and Maidenhead
- Secondary Schools in Windsor and Maidenhead
- State Schools in Windsor and Maidenhead
- Academies & Free Schools in Windsor and Maidenhead
- Secondary Schools by Attainment 8 in Windsor and Maidenhead
- Primary Schools by KS2 Results in Windsor and Maidenhead
- Sixth Forms by A Level Results in Windsor and Maidenhead
- Largest Schools in Windsor and Maidenhead
- 196The Marist SchoolAscot · Independent All-through71.9 Attainment 8 · 401 students
- 226St George's SchoolAscot · Independent Secondary35.8 Attainment 8 · 208 students
- 326St Mary's School AscotAscot · Independent Secondary33.9 Attainment 8 · 401 students
- 423Eton CollegeWindsor · Independent Secondary24.0 Attainment 8 · 1,348 students
- 516Claires Court SchoolsMaidenhead · Independent All-through30.5 Attainment 8 · 862 students
| # | School | Sector | Success Index (England) | Key result | Students |
|---|---|---|---|---|---|
| 1 | The Marist School Ascot · All-through · Ages 2–18 | Independent | 96.2 Top 5% | 71.9 Attainment 8 | 401 |
| 2 | St George's School Ascot · Secondary · Ages 11–19 | Independent | 25.9 Lower 50% | 35.8 Attainment 8 | 208 |
| 3 | St Mary's School Ascot Ascot · Secondary · Ages 11–18 | Independent | 25.9 Lower 50% | 33.9 Attainment 8 | 401 |
| 4 | Eton College Windsor · Secondary · Ages 12–19 | Independent | 23.0 Lower 50% | 24.0 Attainment 8 | 1,348 |
| 5 | Claires Court Schools Maidenhead · All-through · Ages 2–18 | Independent | 16.3 Lower 50% | 30.5 Attainment 8 | 862 |
The Marist School in Ascot leads the 2025 list of independent schools in Windsor and Maidenhead with a Success Index (England) of 96.2. Of the 5 schools shown, 5 are independent.
For the full picture see the wider South East independent schools league table, every school on the Windsor and Maidenhead page, or the comparison tool to put a shortlist side by side.
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Frequently asked questions
What is the best independent school in Windsor and Maidenhead?
The Marist School in Ascot, South East ranks first among independent schools in Windsor and Maidenhead with a Success Index (England) of 96.2 out of 100 (Pupils on roll: 401).
How are independent schools in Windsor and Maidenhead ranked?
Each school's Success Index (England) combines 9 factors: ks2: reading, writing & maths expected standard (35%), ks2: higher standard (20%), ks2: reading progress (10%), ks2: maths progress (10%), progress 8 (20%), attainment 8 (30%), grade 5+ in english & maths (15%), a level points per entry (10%), community advantage (fewer pupils on free school meals) (15%). Each factor is a percentile against schools of the same type across England. Schools with fewer than 60 students are excluded from rankings.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official English data (DfE – Get Information About Schools; DfE – Compare school and college performance). Independent schools rarely appear in the performance tables, so most receive no attainment components and no score.