The Earp gang was a group of 19th century law enforcers that included brothers Virgil, Morgan, and Wyatt Earp, as well as Doc Holliday.

In 1881, a famous gunfight between the Earps and Clantons occurred at the OK Corral in the Arizona city of Tombstone. This event was reenacted in 2268, after pertinent information was pulled from the mind of James T. Kirk (whose ancestors had settled the Wild West) by the telepathic Melkots. (TOS: "Spectre of the Gun")