Mary Carr Moore (6 August 1873 - 9 January 1957) was an American composer, conductor, vocalist,[1] and music educator of the twentieth century.

The opera failed to gain a place in the repertory, and soon disappeared, although Moore conducted revivals in San Francisco in 1925 and Los Angeles in 1945.

In 1932, Moore was commissioned to compose an opera for production in Venice; she chose as her subject an episode in the life of Mary, Queen of Scots.

She had moved to Los Angeles in 1926, and was to remain there for the rest of her life; from 1928 to 1947 she taught theory and composition at Chapman College in Orange, and from 1926 to 1943 she was on the faculty of the Olga Steeb Piano School.

Her son, Dr. John Wesley Moore died in an airplane crash in 1944 while serving as a military doctor in the US Air Force.

In later works, such as David Rizzio, Moore made greater use of the whole tone scale, yet her style remained basically tonal until the end of her career.

Mary Carr Moore is remembered today primarily for her efforts on behalf of the musical life of the West Coast.