John Henry Hobart Ward (June 17, 1823 – July 24, 1903) was an American soldier who fought in the Mexican–American War and in the American Civil War. Ward joined the army in 1842 and fought in multiple battles in the Mexican–American war, including the Battle of Monterrey, where he was wounded. After leaving the army, he served successively as the assistant commissary general and commissary general for the state of New York. With the outbreak of the American Civil War in 1861, Ward rejoined the army, and became the colonel of the 38th New York Infantry Regiment. Ward and his regiment were engaged in the First Battle of Bull Run and in several battles in the Peninsula campaign. He was promoted to command a brigade after the Battle of Chantilly in September 1862.

Ward then led his brigade at the battles of Fredericksburg, Chancellorsville, and Gettysburg. By early 1864, he had developed a strong reputation as a military leader, although there had been an incident when he panicked and fled the field during a night attack at Chancellorsville. On May 6, 1864, during the Battle of the Wilderness, Ward left his command and was observed riding to the rear on an artillery caisson. Six days later, during the Battle of Spotsylvania Court House, Ward was found to be intoxicated by two superior officers. He was removed from command that day, and was arrested on June 12, although he was given an honorable discharge in July and was not sent to a trial. After his removal from military service, Ward served as a clerk in the New York court system, and was struck and killed by a train while vacationing in 1903.