Karl Sune Detlof Bergström (10 January 1916 – 15 August 2004) was a Swedish biochemist. In 1975, he was appointed to the Nobel Foundation Board of Directors in Sweden, and was awarded the Louisa Gross Horwitz Prize from Columbia University, together with Bengt I. Samuelsson.He shared the Nobel Prize in Physiology or Medicine with Bengt I. Samuelsson and John R. Vane in 1982, for discoveries concerning prostaglandins and related substances.
Bergström was elected a member of the Royal Swedish Academy of Sciences in 1965, and its President in 1983. In 1965, he was also elected a member of the Royal Swedish Academy of Engineering Sciences. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1966. In 1985 he was appointed member of the Pontifical Academy of Sciences.
In 1943, Bergström married Maj Gernandt. He had two sons, the businessman Rurik Reenstierna, with Maj Gernandt, and the evolutionary geneticist Svante Pääbo, from an extramarital affair with the Estonian chemist Karin Pääbo. Both sons were born in 1955, and Rurik had learned about existence of Svante only around 2004.