Keith Fitzgerald Thurman is an American professional boxer. He is a former unified welterweight world champion, having held the WBA title from 2015 to 2019, and the WBC title from 2017 to 2018. As of July 2022, he is ranked as the world's fifth best active welterweight by BoxRec.

The World Boxing Association (WBA), formerly known as the National Boxing Association (NBA), is the oldest and one of four major organizations which sanction professional boxing bouts, alongside the World Boxing Council (WBC), International Boxing Federation (IBF) and World Boxing Organization (WBO). The WBA awards its world championship title at the professional level. Founded in the United States in 1921 by 13 state representatives as the NBA, in 1962 it changed its name in recognition of boxing's growing popularity worldwide and began to gain other nations as members.