George Marius Kennedy (July 1841 – 6 March 1869) was an English first-class cricketer and British Army officer.
The son of John Pitt Kennedy, he was born in July 1841 and was educated at Cheltenham College. Kennedy played first-class cricket for the Gentlemen of the North against the Gentlemen of the South on two occasions in 1861 and 1862. In the 1861 fixture, he took a five wicket haul in the Gentlemen of the South's first-innings, taking figures of 5 for 70. After leaving Cheltenham, he attended the Royal Military Academy, Woolwich. He graduated from Woolwich into the Royal Artillery as a lieutenant in 1864. While serving in British India, Kennedy was part of a tiger hunting expedition near Secunderabad when he became ill from heat stroke, dying on 6 March 1869.