William Allen Fuller (April 15, 1836 – December 28, 1905) was a conductor on the Western & Atlantic Railroad during the American Civil War era. He was most noted for his role in the 1862 Great Locomotive Chase, a daring sabotage mission and raid conducted by non-uniformed personnel of the Union Army in northern Georgia. Fuller's determined pursuit prevented the Union agents from driving a captured train north to Tennessee and the Union lines.