| Olympic medal record
|Gold||1912 Stockholm||Team jumping|
Carl Gustaf Sixtensson Lewenhaupt (August 20, 1879 – August 7, 1962) was a Swedish horse rider and modern pentathlete who competed in the 1912 Summer Olympics.
He was part of the Swedish team, which was able to win the gold medal in the equestrian team jumping event. Also he competed in the individual jumping event, where he finished ninth. In the Modern pentathlon competition at the same Olympics he was able to finish seventeenth.