Klaus Katzur (26 August 1943 – 4 September 2016) was a German swimmer who competed in the 1964, 1968 and 1972 Summer Olympics. In 1972 he won a silver medal in the 4 × 100 m medley relay and finished eighth in the 200 m breaststroke. Two years earlier he won two gold medals in these events at the 1970 European Aquatics Championships. Between 1963 and 1972 he won 13 national titles in breaststroke, freestyle and medley events.