James Butler Hickok (May 27, 1837 – August 2, 1876), better known as Wild Bill Hickok, was a figure in the American Old West. His skills as a gunfighter and scout (reconnaissance), along with his reputation as a lawman (Marshal), provided the basis for his fame, although some of his exploits are fictionalized. His nickname of Wild Bill has inspired similar nicknames for men known for their daring in various fields.

Hickok came to the West as a stagecoach driver, then became a lawman in the frontier territories of Kansas (Kansas Territory) and Nebraska (Nebraska Territory). He fought in the Union Army during the American Civil War, and gained publicity after the war as a scout, marksman, and professional gambler. Between his law-enforcement duties and gambling, which easily overlapped, Hickok was involved in several notable shootouts, and was ultimately killed while playing poker in a Dakota Territory saloon.