Klaus Glahn (born 23 March 1942) is a retired West German judoka who competed at the 1964 and 1972 Olympics. In 1964 he won a bronze medal in the openweight class while representing the United Team of Germany. Eight years later he won a silver medal for West Germany in the heavyweight category. Between 1967 and 1973 Glahn won five medals at World Championships in the heavyweight and open divisions. He also won three European heavyweight titles, in 1963, 1968 and 1970. From 1985 to 1988 Glahn was president of the German Judo Federation. He also worked as a manager at Volkswagen Group. In the 2000s Glahn was active in politics. He was a leading candidate from the Rentnerinnen- und Rentner-Partei (RRP) at the 2009 European Parliament election.