St Mary's School
🇬🇧 Official data · 2025Gerrards Cross, South East SL9 8JQ · Buckinghamshire
#486 of 679 all-through schools in South East
#3075 of 4,090 nationally
About St Mary's School
St Mary's School is a independent all-through located in Gerrards Cross, in the Buckinghamshire local authority of South East, England. It caters for Ages 3–18 and is a girls' school. In 2025 it enrolled 391 students. Fee-paying independent schools. Most do not publish Key Stage results in the government performance tables.
Its Success Index (England) is 27.8 out of 100, placing it in the lower 50% of all-through schools in England and 486th of 679 ranked all-through schools in South East. Its strongest component is a level points per entry (75th percentile), and its weakest is grade 5+ in english & maths (11th percentile).
Other published figures: pupils on roll 391; capacity filled 82.3%; grade 4+ english & maths 1.8%; ebacc average points 3.03.
There are 10 schools in Gerrards Cross; St Mary's School ranks 8th of 8 scored schools there.
Success Index (England) breakdown
Each component is a percentile against all-through schools across England.
- 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%)37.6
- Grade 5+ in English & maths (15%)1.8%
- A level points per entry (10%)38.2
- Community advantage (fewer pupils on free school meals) (15%)–
The Success Index (England) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for St Mary's School by the official sources.
- Pupils on roll
- 391
- Number of pupils in the latest school census.
- Capacity filled
- 82.3%
- Pupils on roll as a share of the school's reported capacity.
- Attainment 8
- 37.6
- Average GCSE points across eight subjects.
- Grade 5+ English & maths
- 1.8%
- Share of pupils with a strong pass in both English and maths GCSE.
- Grade 4+ English & maths
- 1.8%
- Share of pupils with a standard pass in both English and maths GCSE.
- EBacc average points
- 3.03
- Average point score across the English Baccalaureate subjects.
- A level points per entry
- 38.2
- Average points per A level entry (A* = 60, E = 10).
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Schools near St Mary's School
Closest schools by straight-line distance, with their Success Index (England).
Thorpe House School
Gerrards Cross · Independent all-through · Ages 3–18
267 students · 367 m away
Gayhurst School
Gerrards Cross · Independent primary · Ages 3–11
334 students · 967 m away
Maltman's Green School
Gerrards Cross · Independent primary · Ages 2–11
286 students · 1.1 km away
St Joseph's Catholic Primary School
Gerrards Cross · Academy primary · Ages 2–11
389 students · 1.1 km away
The Gerrards Cross CofE School
Gerrards Cross · Academy primary · Ages 4–11
434 students · 1.4 km away
Chalfont St Peter CofE Academy
Gerrards Cross · Academy primary · Ages 7–11
317 students · 1.7 km away
Robertswood School
Gerrards Cross · Local authority primary · Ages 3–11
411 students · 2.2 km away
The Chalfonts Community College
Gerrards Cross · Academy secondary · Ages 11–18
1,058 students · 2.2 km away
Chalfont St Peter Infant School
Gerrards Cross · Local authority primary · Ages 5–7
171 students · 2.2 km away
Denham Green E-ACT Primary Academy
Denham Green · Academy primary · Ages 4–11
226 students · 3.4 km away
Similar schools
Independent all-through schools in South East with a comparable Pupils on roll.
Twyford School
Winchester · Independent all-through · Ages 2–13
391 students
Pinewood School
Swindon · Independent all-through · Ages 2–13
392 students
Pangbourne College
Reading · Independent secondary · Ages 11–19
393 students
Michael Hall School
Forest Row · Independent all-through · Ages 2–19
384 students
Sibford School
Banbury · Independent all-through · Ages 3–18
382 students
St Mary's School Ascot
Ascot · Independent secondary · Ages 11–18
401 students
Frequently asked questions
Is St Mary's School a good school?
St Mary's School has a Success Index (England) of 27.8 out of 100 (Lower 50% of all-through schools in England) and ranks #486 of 679 in South East. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does St Mary's School rank in South East?
St Mary's School ranks #486 of 679 all-through schools in South East and #3075 of 4,090 nationally on the Success Index (England) (2025 data).
How many students attend St Mary's School?
St Mary's School had 391 students in 2025.
Is St Mary's School a primary school or a secondary school?
St Mary's School is classified as a all-through covering Ages 3–18. It is a independent school.
What other schools are near St Mary's School?
There are 10 schools within 15 km of St Mary's School; they are listed on this page with their Success Index (England) and distance, and can be compared side by side.