George Henry Chapman (November 22, 1832 – June 16, 1882) was an American sailor, newspaper editor, lawyer, and soldier.

[3] At the beginning of the American Civil War in 1861, he resigned his clerk position to volunteer in the Union Army.

[3] Returning to the cavalry service, Chapman led his regiment during the Battle of Gettysburg in July 1863.

Here his command was part of Col. Thomas C. Devin's brigade, and was noted as the first Union soldiers to engage Confederate forces approaching Gettysburg via the Cashtown road.

[1] Chapman participated in the Valley Campaigns of 1864 against Confederate Lt. Gen. Jubal Early's forces, lasting from May to October.

[5] Chapman led a cavalry brigade in the Union Army of the Shenandoah from August 6 until September 19, when he was wounded during the Third Battle of Winchester.

[3] Beginning on April 19, 1865, he was given command of the cavalry division assigned to Washington, D.C.[1] In recognition of his performance at Winchester in September 1864, on January 13, 1866, President Andrew Johnson nominated Chapman for appointment to the grade of brevet major general of volunteers, to rank from March 13, 1865, and the United States Senate confirmed the appointment on March 12, 1866.