 In addition, Diefenbaker has won city championships in girls' rugby, badminton, and in 2011 the girls field hockey took the division 1 city championship against Western Canada beating them 1-0 in overtime.Diefenbaker was also able to capture the DIV 3 city championship for SR boys volleyball in 2015-2016 and the DIV 3 city championship for SR girls basketball in 2017-2018.Diefenbaker High School's music program is quite large, and among the best in Calgary.