David Idwal Davies (10 November 1915 – 7 July 1990) was a Welsh dual-code international rugby union, and professional rugby league footballer who played in the 1930s and 1940s. He played representative level rugby union (RU) for Wales, and at club level for Swansea RFC, as a centre, i.e. number 12 or 13, and representative level rugby league (RL) for Wales, and at club level for Leeds, as a centre, i.e. number 3 or 4.