Carl William Doy, ONZM (born 1947 in Camberley, Surrey, England) is a pianist, composer and arranger. One of New Zealand's most successful musicians, Carl is probably best known for his multi-platinum selling Piano By Candlelight albums.

Dame Kiri Te Kanawa sang his arrangement of E te Tarakihi from Gisborne in the first live broadcast of the new millennium, to a worldwide television audience of over a hundred million people.