Mary Macmaster (born 22 November 1955, Glasgow, Scotland) is a Scottish harpist and singer. She performs on the clàrsach and the electroharp, and she sings in English and Gaelic. She has worked with Sting, Kathryn Tickell, Norma Waterson, Donald Hay, the Poozies, and in the duo Sìleas with Patsy Seddon. In 2013, she and Seddon were inducted into the Scottish Traditional Music Hall of Fame.