Last updated 28 September 2026
School Guide verdict
Thornton College is an independent girls' secondary school in Milton Keynes where good GCSE passes sit well above the national average, earning it a 5-star rating from School Guide. At its 2025 ISI inspection, inspectors judged the quality of pupils' personal development excellent. The school also achieved good ratings across its academic achievements, leadership, and overall success.
Top grades at GCSE (7-9) and top grades at A level (A*/A)
School Description
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Thornton College was inspected by the Independent Schools Inspectorate (ISI) in 2025, where the quality of the pupils’ personal development was judged excellent, alongside good ratings for academic achievement, governance and leadership, and the overall success of the school.
At GCSE, 84.8% of pupils achieved good passes (5 or more GCSEs at grades 9-4 including English and maths), which is well above the national average of 38.9%.
There are 315 pupils attending the school.
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