David Michael Rhys Davies (born 3 March 1985) is a Welsh former competitive swimmer who has represented Wales at the Commonwealth Games, and swam for Great Britain at Summer Olympics, world championships and European championships, winning medals in each of those major international championships.
Davies specialises in long-distance freestyle events.
Born in Barry, Vale of Glamorgan, Davies swam for Wales at the 2002 and 2006 Commonwealth Games and represented Great Britain at the 2004, 2008 Olympics and 2012 Olympics.
As of the end of 2010, he held the British Records in the 400-, 800- and 1500-metre freestyle events.