August Ferdinand Haeser (1794–1874) was a German composer and music educator known primarily for his contributions to the field of vocal music and pedagogy. He was associated with the Romantic music movement, which emphasized emotional expression and individualism. Haeser is particularly noted for his choral works and songs, which often drew on folk themes and were characterized by lyrical melodies and rich harmonies. Among his notable works are various choral pieces and songs for solo voice, which have been used in educational settings as examples of Romantic vocal music. In addition to his compositions, Haeser had a significant impact as a music educator, influencing future generations of musicians through his teaching methods and writings on music theory. His emphasis on the importance of singing and choral participation in education helped shape the landscape of music instruction in Germany during his time. While not as widely recognized today as some of his contemporaries, Haeser's contributions to vocal music and music education represent an important facet of 19th-century German music, reflecting the era's artistic values and the growing importance of music in public and educational life.