Charles John Scott Sergel (12 May 1911 – 21 May 1980) was a surgeon, missionary doctor and a rower who competed at the 1932 Summer Olympics. Sergel was born in Rio de Janeiro, Brazil, the son of missionaries. He attended Monkton Combe School and Clare College, Cambridge. In 1931 and 1932 he was a member of the winning Cambridge boats in the 1932 and 1933 Boat Races. The 1932 crew won the Grand Challenge Cup at Henley Royal Regatta rowing as Leander Club, and was subsequently chosen to represent Great Britain at the 1932 Summer Olympics in Los Angeles, where they came fourth. He again represented the winning Cambridge crew in the Boat Race in 1933 when he was president.