Marcel Georges Lucien Grandjany (/ɡrænʒəˈniː/ gran-zhə-NEE) (3 September 1891 – 24 February 1975) was a French-American harpist and composer.

At seventeen he made his debut with the Concerts Lamoureux Orchestra, and gave his first solo recital, winning immediate acclaim.

He appeared as soloist with major orchestras under the direction of Gabriel Pierné, Alfred Cortot, Walter Damrosch, Serge Koussevitzky, George Szell, Fritz Reiner and Vladimir Golschmann, among others.

He moved to the United States in 1936[1] and was appointed head of the Harp Department at the Juilliard School in 1938, where he taught until his death in 1975.

He was also head of the harp department at the Manhattan School of Music from 1956 to 1967. Notable students include American harpists Nancy Allen, Catherine Gotthoffer, and Eileen Malone.