Have Gun – Will Travel is an American Western television series that was produced and originally broadcast by CBS on both television and radio from 1957 through 1963. The television version of the series starring Richard Boone was rated number three or number four in the Nielsen ratings every year of its first four seasons.

Set in the period of the Old West, the series follows the adventures of "Paladin", played by Boone, a gentleman investigator/gunfighter who travels around the Old West working as a gunfighter for hire. Although Paladin charges steep fees to clients who can afford to hire him, typically $1,000 per job, he provides his services for free to poor people who need his help.

A radio series starring John Dehner debuted November 23, 1958, more than a year after the premiere of its televised counterpart, making Have Gun – Will Travel one of the few shows in television history to spawn a successful radio version.