This is one the most frequently asked questions at WyattEarpFAQs.com.

Wyatt Earp had no children.  There is speculation that his first wife, Urilla, died in childbirth along with their baby, but there are no official records that support this.  Wyatt was childless with his second wife, Mattie, and with Josephine.

A similar question and answer on this site is Did any of the Earp siblings have any children and are there any descendants?

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Christina comments:  "I am a descendent of Edward Earp. Edward Earp is Wyatt Earp's Great-Great-Great Uncle. In my ancestry family tree, which I have branched back down to Wyatt Berry Stapp Earp, it DOES list Wyatt having a daughter, Martha, from his marriage to Urilla. any other descendents have the same info?"