William Horsley (1774–1858) was an English composer, pianist, and conductor, primarily known for his contributions to the early Romantic era of music. His works predominantly fall within the classical genre, focusing on vocal and choral music, as well as piano compositions. Horsley is best remembered for his hymns and anthems, notably the popular "I Will Sing with the Spirit" and "The Lord is My Shepherd," which reflect his skill in setting religious texts to music. His compositions often featured intricate vocal harmonies and were widely performed in churches and concert halls during his time. In addition to his choral works, Horsley was an advocate for music education and served as a conductor for various choirs and musical societies. He was also a member of the Royal Society of Musicians. His impact on music includes the promotion of sacred music in the English choral tradition, influencing subsequent generations of composers. Although not as widely recognized today, his contributions helped shape the landscape of 19th-century British music and laid groundwork for future developments in the genre.