Count Carl Clarence von Rosen (May 12, 1867, – August 12, 1955) was a Swedish athlete, military officer, and Crown Equerry to the King of Sweden. He became a member of the International Olympic Committee in 1900, and was credited for the re-introduction of Equestrian at the Summer Olympics after it was dropped at the 1904 Olympic Games. He competed in many sports, such as bandy (which he introduced to Sweden), ice hockey, football, lawn tennis and ice skating.
During the 1930s Clarence and his brother played a leading role in Swedish upper class Nazi-movement.
Clarence von Rosen was the brother of Count Eric von Rosen.
von Rosen was also the first chairman of the Swedish Football Association. In honour of his name the champions of Swedish football was each year between 1904 and 2000 rewarded the von Rosens pokal (English: von Rosen's trophy). However, in the year 2000, after the "re-discovery" (it was news in the early 1920s) of von Rosen's wife's sister had married the far later unfamous Nazi leader Hermann Göring during his years in Sweden, the trophy was replaced by Lennart Johanssons Pokal, but without any allegations against the entire von Rosen family .