UWC Atlantic is an independent boarding school in the Vale of Glamorgan in south Wales. Founded in 1962, it was the first of the United World Colleges and was among the first educational institutions in the world to follow an international curriculum; it helped create the International Baccalaureate Diploma Programme in the 1960s.

United World Colleges (UWC) is an international network of schools and educational programmes with the shared aim of "making education a force to unite people, nations and cultures for peace and a sustainable future." The organization was founded on the principles of German educator Kurt Hahn in 1962 to promote intercultural understanding.