Ardingly College is an independent day and boarding co-educational school also situated in the village of Ardingly. The college provides Nursery, Pre-Prep, Prep, Senior and Sixth Form education for both day and boarding pupils.
Over a number of years, St. Peter's and Ardingly College have developed strong links which have benefited pupils and staff at both schools. Opportunities have included drama performances, peer mentoring and enrichment. Pupils at St. Peter's have also been fortunate enough to be able to visit the collage for swimming lessons.
In 2019 both schools entered into a a non-binding partnership underwritten by a 'Memorandum of Understanding', the purpose of which was to further develop areas of mutual support to assist in driving educational outcomes at both schools.