John Amner (c. 1540 – 1612) was an English composer, primarily known for his contributions to sacred music during the late Renaissance period. His work predominantly falls within the genres of choral and vocal music, particularly in the realm of Anglican church music. Amner is best known for his anthems and services, with notable works including "O Lord, how long wilt thou be angry," and "Magnificat and Nunc Dimittis in C." His compositions often exhibit intricate polyphony and rich harmonic textures, reflecting the influences of both the earlier Tudor style and the emerging Baroque idiom. Though not as widely recognized as contemporaries like Thomas Tallis or William Byrd, Amner's impact on the development of English choral music is significant. His works were performed in cathedrals and churches, contributing to the evolution of the Anglican tradition. Amner's music is characterized by its emotional depth and liturgical function, making him an important figure in the history of English sacred music. His legacy continues to be appreciated through performances and recordings of his choral works.