John Francis Barnett (1802–1890) was an English composer, conductor, and music educator known primarily for his contributions to choral and orchestral music. He was associated with the Romantic genre and is best recognized for his cantatas and operatic works. Barnett's notable compositions include the cantata "The Mountain Sylph" (1834), which enjoyed popularity during his lifetime, and the opera "The Enchantress" (1840), which showcased his ability to blend lyrical melodies with dramatic narratives. Barnett also made significant contributions to the British music scene as a conductor, notably with the Royal Academy of Music and the Philharmonic Society of London. His works reflected the broader trends of the time, emphasizing emotional expression and the integration of nationalistic themes in music. While not as widely remembered today as some of his contemporaries, Barnett's influence on the development of British opera and choral music helped pave the way for future generations of composers. His dedication to music education and promotion of the arts also played a crucial role in fostering a richer cultural landscape in 19th-century England.