George Stoneman, Jr., United States Army cavalry officer (d. 1894)
George Stoneman Jr. (August 8, 1822 – September 5, 1894) was a United States Army cavalry officer and politician who served as the fifteenth Governor of California from 1883 to 1887. He was trained at West Point, where his roommate was Stonewall Jackson, and graduated in 1846. Stoneman served in the Army for thirty-six years, though he was relieved of command in 1871. During this time, he was involved in multiple conflicts, including the Mexican–American War, where he did not see any combat, the Yuma War, and the American Civil War. In 1861, Stoneman was promoted to Brigadier General, and was later put in command of the Army of the Potomac's 3rd Infantry Corps, and subsequently the newly-created cavalry corps.

At the Battle of Chancellorsville in 1863, under the command of Joseph Hooker, Stoneman failed in an ambitious attempt to penetrate behind enemy lines, getting bogged down at an important river crossing. Hooker placed much of the blame for the Union army's defeat on Stoneman. His sharp criticism may have been in part intended to deflect blame placed on himself for the North's defeat.

While commanding cavalry under William Tecumseh Sherman in Georgia, Stoneman was captured, but soon exchanged.

During the early years after the American Civil War, Stoneman commanded occupying troops at Memphis, Tennessee, who were stationed at Fort Pickering. He had turned over control of law enforcement to the civilian government by May 1866, when the Memphis riots broke out and the major black neighborhoods were destroyed. When the city asked for help, he suppressed the white rioting with use of federal troops. He later moved out to California, where he had an estate in the San Gabriel Valley. He was elected as governor of California, serving between 1883 and 1887. He was not nominated a second time.