Hal Schaefer (22 July 1925 – 8 December 2012) was an American jazz musician and vocal coach.
He coached Marilyn Monroe, Mitzi Gaynor, Judy Garland, Robert Wagner, Jane Russell and Barbra Streisand in films and musical comedy songs, and composed the film scores to The Money Trap (1965) and The Amsterdam Kill (1977).
During his career he helped many directors and producers such as Howard Hawks, Harold Prince and George Cukor.
Schaefer once performed a musical piece for Eleanor Roosevelt and sang at the United Nations's anniversary in 1955.
He moved to Florida in the 1990s and continued to teach voice lessons to students until his death.