St Mary's School
Gerrards Cross, Buckinghamshire, South East · SL9 8JQ
Founded in 1872, St Mary's is a small Anglican day school for girls in Gerrards Cross, educating around 440 pupils from age 3 through to the sixth form. Its intimate scale is reflected in a sixth form of just 52, and the school's pastoral character is borne out by an Independent Schools Inspectorate judgement of "excellent" for both education quality and personal development, with all compliance standards met. A notably high proportion of pupils, over 44 per cent, receive some form of SEN support, suggesting a school attentive to individual learning needs. Day fees range from around £13,000 to £26,700 a year.
440
Pupils
excellent
ISI
£26,676
Day fees / yr
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Open in Google Maps ↗Overview & data
- Gender
- Girls
- Type
- independent (fee-paying) school
- Age range
- 3-18
- Pupils
- 440
- Location
- Gerrards Cross, Buckinghamshire, South East
- Website
- www.stmarysgx.co.uk
- Telephone
- 01753 883370
Entrance & admissions
- Entry age
- 11
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Headteacher
Head Mrs Patricia Adams
Latest results
Attainment 8
37.6
National average 46.9
GCSE grade 5+ (English & Maths)
2%
National average 47%
GCSE grade 9-7
50%
A-level A*-A
64%
Teaching & academics
Results sit below national benchmarks at GCSE, with an Attainment 8 score of 37.6 against a national average of 46.9 and 2 per cent achieving grade 5 or above in English and Maths, though half of grades fall in the 9-7 band. The sixth form looks stronger, with 64 per cent of A-level entries graded A*-A and popular choices including Sociology, Psychology, Mathematics and Economics. Alongside GCSEs and A-levels the school offers the EPQ, and languages on offer are French and Spanish.
Sixth form
- Sixth-form pupils
- 52
Popular A-level subjects
Qualifications offered
Learning support & SEN
- SEN support
- 44.42%
- EHC plans
- 2.28%
Arts & extracurricular
Scholarships
Languages
Popular GCSE subjects
Sport
Main sports
Beyond the classroom
Netball, gymnastics and badminton lead the sporting programme, and the breadth of scholarships, spanning art, music, drama, sport and dance, signals a school that values pursuits beyond the classroom.
Ethos & heritage
- Founded
- 1872
- Religious character
- Anglican
- Boarding
- No
Mobile phone policy
No mobile phones allowed in prep. Senior house students must hand phones in at the beginning of each day and collect at the end. Sixth form allowed to use phones in certain areas in designated Sixth Form centre but nowhere else in school.
Money matters
- Day fees (per year)
- £13,104 - £26,676
Small number of means-tested bursaries available
Inspection reports
- ISI rating
- excellent
- ISI personal development
- excellent
- Last inspected
- 4 November 2024
The last word
A small, established girls' school whose pastoral strengths and individual attention may matter more to many families than its headline GCSE figures.
The Passmate verdict
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St Mary's School 11+: frequently asked questions
Where is St Mary's School located?
St Mary's School is located at Packhorse Road, Gerrards Cross, SL9 8JQ.
What type of school is St Mary's School?
St Mary's School is an independent (fee-paying) school in South East.
How many pupils attend St Mary's School?
St Mary's School has approximately 440 pupils on roll.
What is St Mary's School's inspection rating?
St Mary's School is inspected by the ISI and was judged "excellent" at its inspection on 4 November 2024.
Compiled from public data. Last checked June 2026.