Robert Clay Allison (September 2, 1841 – July 3, 1887) was a cattle rancher, cattle broker, and sometimes gunfighter of the American Old West. He fought for the Confederacy in the Civil War. Allison had a reputation for violence, having survived several one-on-one knife and gunfights (some with lawmen), as well as being implicated in a number of vigilante jail break-ins and lynchings. A drunken Allison once rode his horse through town nearly naked—wearing only his gunbelt. Later most reports stated that he was not only dangerous to others but himself accidentally shooting himself in the foot.