Jazmin Roxy "Jazz" Carlin (born 17 September 1990) is a former British competitive swimmer, who previously represented Wales and the Great Britain swimming team.

[3] She won gold for Wales at the 2014 Commonwealth Games, double gold for Great Britain in the 400 metres and 800 metres freestyle at both the 2014 European Championships (long course) and the 2015 European Championships (short course) before winning two silver medals for Great Britain in the same events behind Katie Ledecky at the 2016 Summer Olympics.

[1] In her international debut at the European Short Course Swimming Championships 2005 in Trieste, Italy, Carlin failed to qualify past the heats of the 200 and 400-metre freestyle.

At the 2008 European Short Course Swimming Championships in Rijeka, Croatia, Carlin was eliminated in the heats of the 200 and 400 metre freestyle.

At the 2009 World Aquatics Championships in Rome, Italy, Carlin, along with Joanne Jackson, Caitlin McClatchey and Rebecca Adlington won the bronze medal in the 4x200-metre freestyle relay with a time of 7:45.51, a European record.