Lincoln Castle Academy is an academy converter in Lincoln, Lincolnshire, admitting pupils aged 11-16. It has a sixth form offering post-16 education. It is part of DELTA ACADEMIES TRUST. The school has approximately 709 pupils on roll, of whom 44% are eligible for free school meals.
In 2025, pupils achieved an Attainment 8 score of 40.8, placing the school #30 in Lincolnshire and #2,448 of 3,216 nationally. 41.70% of pupils achieved grade 5 or above in English and Maths. 10.5% of all GCSE entries were graded 9–7.
Ofsted last inspected the school in 2022. The school's current overall rating is Inadequate. Inspectors assessed quality of education as Inadequate, behaviour and attitudes Requires improvement, personal development Requires improvement, and leadership and management Requires improvement.
In the most recent admissions cycle, applications were at 0.4× capacity.
The pupil-to-qualified-teacher ratio is 20.0:1. There are no current teaching vacancies.
In the 2024/25 academic year, there were 4 permanent exclusions. The average suspension rate was 39.1 per 1,000 pupils per term.