William Arms Fisher (b. April 27, 1861 in San Francisco; † December 18, 1948 in Boston) was a U.S. composer, music historian, and publisher.

Fisher studied at the National Conservatory of Music of America in New York with Horatio Parker and Antonín Dvořák. He was a friend of Dvořák and joined him in advocating for colored students at the National Conservatory. His arrangement of the second movement of Dvořák's Symphony From the New World with the text Goin' Home, which was also used for several film soundtracks, became well-known. He arranged numerous Negro spirituals and published the collection Seventy Negro Spirituals in 1926.

In 1897 Fisher became director of publications, and in 1926 vice president of the Oliver Ditson Company in Boston, for which he worked for forty years. Twice he served as president of the Music Teachers National Association. As a music historian, he took a special interest in 18th- and early 19th-century American music, publishing books such as Notes on Music in Old Boston (Boston, 1918) and One Hundred and Fifty Years of Music Publishing in the United States (Boston, 1934), and the anthologies Ye Olde New-England Psalm tunes 1620-1820 (Boston, 1930) and The Music that Washington Knew (Boston, 1931).