Arthur Willard Pryor (September 22, 1869 – June 18, 1942) was a trombone virtuoso, bandleader, and soloist with the Sousa Band. He was a prolific composer of band music, his best-known composition being "The Whistler and His Dog". In later life, he became a Democratic Party politician from New Jersey, who served on the Monmouth County Board of Chosen Freeholders during the 1930s.