The John Fisher School is a Roman Catholic voluntary-aided boys' faith school based at Peaks Hill, Purley, Croydon, Surrey, England. Today the school operates as a local standard Roman Catholic Comprehensive School, educating boys mainly from around South and Central Croydon. However, the school has a history of selection, and in the past has drawn pupils from across London and South East England.
In spite of its Croydon postcode and location, the school is funded by the London Borough of Sutton. The school has operated selective admissions policies twice in its history, from when it was founded in 1929 until 1977, and more recently from 1991 to 2008. It was, alongside the London Oratory School, one of the last selective entry Catholic comprehensive schools to defy the Schools' Admissions Code by continuing to interview prospect pupils and their parents.