St Mellons has 5 state primary schools: "Meadowlane Primary School", "St Bishop Childs Church in Wales", "Oakfield Primary", "Willowbrook Primary" and "St. Mellons Primary". It also has a private school St John's College, Cardiff, amongst the best performing schools in Wales, based on results. The building and surrounding fields were part of the "Ty-to-Maen convalescent house", which only closed in the 1970s. The surrounding land was sold off for housing in the late 1990s following the death of the house's former owner William Nicholls, who now has a street on the estate named after him.