John Joel Glanton (c. 1819 – April 23, 1850) was an early settler of Arkansas Territory. He was also a Texas Ranger and a soldier in the Mexican–American War and the leader of a notorious gang of scalp-hunters in Northern Mexico and the Southwestern United States during the mid-19th century. Contemporary sources also describe him as a murderous outlaw and prominent participant in the Texas Revolution. He appears as a violent figure in the works of the prominent Western writers Larry McMurtry and Cormac McCarthy.