Thornden School is an academy converter in Eastleigh, Hampshire, admitting pupils aged 11-16. It is part of HISP MULTI ACADEMY TRUST LTD. The school has approximately 1,451 pupils on roll, of whom 6% are eligible for free school meals.
In 2025, pupils achieved an Attainment 8 score of 59.9, placing the school #1 in Hampshire and #249 of 3,216 nationally. 72.80% of pupils achieved grade 5 or above in English and Maths. 39.9% of all GCSE entries were graded 9–7.
Ofsted last inspected the school in 2022. The school's current overall rating is Good. Inspectors assessed quality of education as Good, behaviour and attitudes Good, personal development Good, and leadership and management Good.
The school is oversubscribed — in the most recent cycle, there were 1.1× as many applications as places, making a successful application competitive.
The pupil-to-qualified-teacher ratio is 18.3:1. There are no current teaching vacancies.
In the 2024/25 academic year, there were no permanent exclusions. The average suspension rate was 1.6 per 1,000 pupils per term.