Castle High School may refer to:
United Kingdom Castle High School (Belfast) in Belfast, Northern Ireland Castle High School (Dudley) in Dudley, England
United States John H. Castle High School in Newburgh, Indiana James B. Castle High School in Kaneohe, Hawaii
See also Castle Hill High School in Castle Hill, New South Wales, Australia Castle Hill High School, Offerton in Stockport, England, United Kingdom Mearns Castle High School in Newton Mearns, East Renfrewshire, Scotland, United Kingdom