Alia Shanee Atkinson, СD (born 11 December 1988) is a Jamaican five-time Olympian and a former competitive swimmer whose international competition career spanned 19 years, 2003 to 2021 inclusive, at the senior level. At short course World Swimming Championships, she is a ten-time medalist in individual events, including four gold medals, four silver medals, and two bronze medals. She won a total of 124 medals, of which 74 were gold medals, at Swimming World Cup circuits over the course of her career. She won 14 total medals in individual events, 11 gold, 1 silver, and 2 bronze, from her first three Central American and Caribbean Games, in 2006, 2010, and 2018.
In 2014, Atkinson became the first Afro-Jamaican to win a world title in swimming, winning the short course 100-metre breaststroke at the 2014 World Swimming Championships with a world record time of 1:02.36. In 2016, she tied her world record in the short course 100 metre breaststroke on 26 August before setting a new world record in the short course 50-metre breaststroke on 26 October. Two years later, on 6 October 2018, she set her second new world record in the short course 50-metre breaststroke, marking her fourth world record time in an individual event. At the 2012 Summer Olympics, she became the second Jamaican swimmer to place in the top four at an Olympic Games, finishing fourth in the 100-metre breaststroke.