Peter Lloyd CBE (born 26 June 1907, Sheffield, England, died Toowoomba, Queensland, Australia, 11 April 2003), was a mountaineer and engineer, a President of the Alpine Club.
The son of an economics lecturer, Lloyd was educated at Gresham's School, Holt, from 1921 to 1924, and then read Engineering at Trinity College, Cambridge. While there, he was president of the University's Mountaineering Club.
He continued with his climbing and became an experienced alpinist in the late 1920s and early 1930s. In 1936, he was chosen for the British–American Himalayan Expedition Nanda Devi, led by Bill Tilman, who called him "first-rate on rock and ice".
In 1938, Tilman assembled a team for an attempt on Mount Everest, and again he chose Lloyd. This expedition reached a height of 27,200 feet.
Lloyd used his engineering skills to work on oxygen equipment for high-altitude climbing, favouring a system which used ordinary air as well as cylinder oxygen. He thus contributed greatly to John Hunt's successful ascent of Mount Everest in 1953, commenting on the oxygen question - "I have a lot of sympathy with the sentimental objection to its use, and would rather see the mountain climbed without it than with; but, on the other hand, I would rather see the mountain climbed with it than not climbed at all." Lloyd was also a member of the Joint Himalayan Committee, which organised and financed the expedition.
He was President of the Alpine Club from 1977 to 1980 and delivered a moving oration at the memorial service in 1978 of Bill Tilman, who was lost at sea in the south Atlantic at the age of 79.