Clement Haughton Langston Cazalet (16 July 1869 – 23 March 1950) was a British tennis player who competed in the 1908 Summer Olympics. He was the son among ten children of businessman William Clement Cazalet (brother of Edward Cazalet) and Emmeline Agnes Cazalet (nee Fawcett). Cazalet was educated at Rugby School and Trinity College, Cambridge. His career singles highlights include winning the Cambridge University LTC Tournament in 1888, the Keswick Open in 1891, and the Carlisle Open in 1899. In 1908 he won the bronze medal in the men's doubles competition together with his partner Charles Dixon. While serving in the First World War as a Major and volunteer ambulance driver with the British Red Cross Society and St John Ambulance Brigade, Cazalet was awarded the Distinguished Service Order in the 1917 Birthday Honours. By profession, he was a marine engineer who worked on undersea cable laying projects in the Atlantic and Pacific Ocean.