The Mosman Preparatory School, officially the Mosman Church of England Preparatory School and commonly abbreviated as Mosman Prep, is a dual-campus independent Anglican single-sex primary day school for boys, located on the Lower North Shore and the Northern Beaches of Sydney, New South Wales, Australia. The school was established in 1904 and is based on the UK preparatory school system. The school provides a religious and general education to boys from Year K to Year 6 across two campuses, located in Mosman and in Terrey Hills.