Halley G. Maddox (January 29, 1899 – May 26, 1977) was a career officer in the United States Army. A 1920 graduate of the United States Military Academy, he was originally assigned to the Infantry branch and later transferred to Cavalry. A noted horseman, he took part in numerous equestrian shows as a member of U.S. Army teams and was also a member of numerous Army polo teams during the height of the sport's popularity in the 1920s.