King William’s College (often referred to as KWC or King Bill’s; Manx: Colleish Ree Illiam) is a private, co-educational institution catering to students aged 3 to 18, located near Castletown on the Isle of Man. As a member of both the International Baccalaureate and the Headmasters’ and Headmistresses’ Conference organizations, the College offers a broad and rigorous educational experience. It operates across two campuses in or near Castletown: the main senior school campus located by Castletown Bay, and The Buchan School, a prep school situated two miles away in the Westhill area. Originally an all-boys institution, the College transitioned to co-education in the 1980s. With an enrollment of around 500 students, King William’s College continues to provide a nurturing and academically challenging environment.