William Fisk Sherwin (1826–1888) was an American composer, musician, and music publisher known primarily for his contributions to sacred music and hymnody during the 19th century. He was a prominent figure in the development of American hymn tunes and is often associated with the genre of gospel music. One of Sherwin's most notable works is the hymn tune "Sherwin," which is widely recognized for its use in various hymnals, including "The Baptist Hymnal." His compositions often blended traditional European musical influences with American folk elements, making them accessible and appealing to congregations of the time. In addition to his work as a composer, Sherwin was also a successful music publisher, founding the firm "Sherwin & Co." in Boston, which published a variety of musical works, including songbooks and hymnals. His impact on music is particularly significant in the context of American religious music, as he helped shape the sound of congregational singing in the 19th century. Sherwin's legacy continues through the enduring popularity of his hymns and the influence he had on subsequent generations of hymn writers and composers.