Frank Marshall King (November 28, 1883 – May 29, 1959), was a Spanish, Catalan pianist and pedagogue born to parents of English heritage. Marshall was born in Mataró, Catalonia, Spain. He attended the Conservatori Superior de Música del Liceu and then began studying with Enrique Granados. Marshall and Granados became close musical associates, and Marshall became Granados's teaching assistant at the latter's academy. Marshall died in Barcelona in 1959, aged 75.