Douglas Keith Scott CBE (29 May 1941 – 7 December 2020) was an English mountaineer and climbing author, noted for being on the team that made the first ascent of the south-west face of Mount Everest on 24 September 1975. In receiving one of mountaineering's highest honours, the Piolet d'Or Lifetime Achievement Award, his personal style and his climbs were described as "visionary".

Over the years he was on 40 expeditions to the high mountains of Asia, during which he made some 30 first ascents. In 2020 he was diagnosed with cancer, and he died of the disease in December 2020.

Scott was born in Nottingham, England, and was the eldest of three sons. Scott would later discover that his mother was born at almost the exact same time as famed mountaineer Edmund Hillary, which Scott felt was an uncanny coincidence.

Scott was educated in Nottingham at Cottesmore Secondary Modern and Mundella Grammar schools. He started climbing at the age of 13, his interest sparked by seeing climbers on the Black Rocks in Derbyshire whilst hiking with the Scouts. His father, George Scott, was a policeman and amateur boxer, who was the Amateur Boxing Association 1945 British Heavyweight Champion. His father gave up the game to focus on the family. Scott lived on the outskirts of Nottingham with his father and mother, Edith Scott, and younger brothers, Brian and Garry. All were encouraged towards the open countryside, particularly the Peak District.

After two years at Loughborough Teachers' Training College (1959–61), Scott taught geography, history, PE and games for ten years at his old secondary modern school.

Scott was considered one of the world's leading high-altitude and big-wall climbers and was the recipient of numerous awards for his achievements. He was the first English person to reach the summit of Mount Everest and, on the descent, he survived an unplanned bivouac with Dougal Haston 100 metres below the summit, without oxygen, sleeping bags and, as it turned out, without frostbite. Apart from his first ascent of the southwest face of Everest with Haston in 1975, all his other Himalayan climbs were achieved in lightweight or pure Alpine style. He pioneered big wall climbing on Baffin Island, Mount Kenya and in the Karakoram, famously on the "fearsome Karakoram peak" The Ogre in Pakistan with Chris Bonington, and later on Shivling in the Indian Himalayas. Abseiling from the summit of The Ogre, Scott slipped and broke both his legs at 7,200 metres. With rescue not a possibility at that height, Scott crawled on his knees back to base camp through a storm, on a mountain of considerable difficulty, helped down by his teammates Mo Anthoine and Clive Rowland. It remains one of the great survival stories in world mountaineering.

Scott was a founder member of the Nottingham Climbers Club (1961), president of the Alpine Climbing Group (1976–82), vice president of the British Mountaineering Council (1994–97) and president of the Alpine Club (1999–2001). He was made a CBE in 1994. In 1999 he was awarded the Patron's Medal of the Royal Geographical Society. In 2005 he was presented with the Golden Eagle Award by the Outdoor Writers and Photographers Guild. Also in 2005, following on from Tom Weir and Adam Watson, he became the third recipient of the John Muir Trust Lifetime Achievement Award in recognition of his mountaineering accomplishments and commitment to conservation and supporting mountain people and mountain environments around the world. Following on from Walter Bonatti and Reinhold Messner he received the Piolet d'Or Lifetime Achievement Award in Chamonix in 2011.

Scott was made a Freeman of the City of Nottingham in 1976 and has since had a Nottingham tram named after him. He was awarded an honorary MA by the universities of Nottingham and Loughborough, 1993; Hon. MEd Nottingham Trent, 1995; Hon Dr. Derby University, 2007; and Hon Dr. Loughborough University, 2017.