February 29 – in Sydney, Australian swimmer Dawn Fraser sets a new world record in the women's 100m freestyle (long course) competition: 58.9 seconds.
March 29 – Australia's Kevin Berry sets a new world record in the men's 200m butterfly (long course) at a meet in Sydney, clocking 2:06.9.
July 12 – US swimmer Sharon Stouder breaks the world record in the women's 200m butterfly (long course) with one second, during a meet in Philadelphia, Pennsylvania, clocking 2:28.1.
August 2 – Sharon Stouder once again breaks the world record in the women's 200m butterfly (long course), this time in Los Altos, California, clocking 2:26.4.