Arnold Rosner (born New York City, November 8, 1945 – November 8, 2013) was an American composer of classical music.
Rosner, of Jewish descent, got his training at State University of New York at Buffalo, New York; according to his own account he learned nothing there. Rosner took his own path and composes in the style of Romanticism, traditionally. He has composed in all kinds of genres: opera (3); symphony (8), string quartet (6), chamber music and songs. Many of his compositions have been influenced by his original beliefs, but also e.g. by Catholicism.