Helene Emma Madison (June 19, 1913 – November 27, 1970) was an American competition swimmer, Olympic champion, and former world record-holder. She won three gold medals in freestyle at the 1932 Summer Olympic Games, becoming, along with Romeo Neri of Italy, the most successful athlete there. She was born in Madison, Wisconsin.
In sixteen months in 1930 and 1931, she broke sixteen world records in various distances. Following the 1932 Olympics she appeared in the films The Human Fish and The Warrior's Husband and hence, as a professional, was not allowed to participate in the 1936 Summer Olympics in Berlin. After her swimming career, she had odd jobs as a swimming instructor, department store clerk and a nurse. Divorced three times and living alone, she died of throat cancer in 1970 in Seattle, Washington.