John G. Diefenbaker High School is a senior public high school located at 6620 4th Street N.W., Calgary, Alberta. The school is named after the 13th Prime Minister of Canada Rt. Hon. John G. Diefenbaker. The school is part of the Calgary Board of Education. The school graduates around 400 Grade 12 students every year, with a 91% graduation rate. There are currently 1405 students (as of September 2017).