
Sam Charles Marsters (1878-1907) was an American outlaw of the Wild West who was affiliated with the Laramie Gang in Wyoming during the 1900s. In 1907, he accompanied gang boss David Geddes to intimidate the ranch hands at Pronghorn Ranch in Colorado, only to watch his boss be beaten down by ranch hand John Marston. He was presumably among the dead in the shootout at Hanging Dog Ranch a few nights later.