Harold Clarke (1888 – 11 March 1969 in Christchurch, Canterbury, New Zealand) was a British diver who competed in the 1908 Summer Olympics, in the 1920 Summer Olympics, and in the 1924 Summer Olympics.
In 1908 he was eliminated in the semi-finals of the 3 metre springboard competition. Twelve years later he finished ninth in the plain high diving event. In 1924 he won the bronze medal in the plain high diving competition.