Fritz Thiedemann (March 3, 1918 - January 8, 2000) was German equestrianist, considered to be one of the greatest show jumpers of his time.

Born in the town of Heide (Schleswig-Holstein), as the son of a farmer. His riding talents became clear at a young age, but he could not display them internationally until after World War II.

At the 1952 Summer Olympics, Thiedemann achieved a unique performance, winning medals in two equestrian disciplines, a feat since unequalled. He placed third in the dressage team event, and won another bronze medal in the individual jumping contest with his favourite horse Meteor, with which he would win all major prizes in his career.

The following year, Thiedemann won a jumping silver at the World Championships, winning another medal (bronze) in that event in 1956. That same year, he won a gold medal with the German team in the 1956 Summer Olympics in Melbourne, while just missing out on an individual medal with a fourth position.

At the 1958 European Championships, he took the title. Thiedemann was the flag-bearer of the German team (composed of both East and West German athletes) at the 1960 Summer Olympics in Rome. The German team successfully defended their jumping title, Thiedemann winning his fourth Olympic medal. In addition, he placed 6th in the individual jumping competition.

Fritz Thiedemann passed away in his birthplace Heide at age 81.