Margaret Ravoir (1907 - October 17, 1973) was an American swimmer who completed in the Olympics and would become best known for winning the widely attended Canadian National Exhibition women's 10-mile swim in Lake Ontario, each of the years from 1930 to 1932.

[8] In 1930, in her first win of the highly publicized Lake Ontario 10-mile women's Marathon sponsored by William Wrigley, which she had trained for with her future husband George Young, her time was 5 hours, 33 minutes.

[10] Against 35 rivals, and a crowd of 100,000, she won the event and took home the $5,000 first prize purse, completing the race a half mile ahead of the second-place finisher.

[11] Despite her margin of victory, diminished crowds and the Depression cut her earnings on August 27, 1932 for the 10 mile Lake Ontario Race from a former $5,000 to $3,000.

[3] Ravoir retired in 1967 from her job in Philadelphia as a book keeper at the Naval Publications and Forms Center, where she had been employed for nineteen years.