Sidney Homer, Sr. (9 December 1864 – 10 July 1953) was a classical composer, primarily of songs.

Homer was the youngest child born to deaf parents in Boston, Massachusetts, on December 9, 1864 (some sources use 1865).

Sidney Homer died on July 10, 1953, in Winter Park, Florida.

Sidney Homer's influence included his mentoring and supporting his nephew, the composer Samuel Barber.

Homer's memoir, My Wife and I, was published by Macmillan in 1939 and reprinted by Da Capo Press in 1978.