Terence "Bud" Allan Crawford (born September 28, 1987) is an American professional boxer. He has held multiple world championships in three weight classes, including the WBO welterweight title since 2018. Previously he held the WBO, Ring magazine and lineal lightweight titles from 2014 to 2015; and the undisputed WBA (Super), WBC, IBF, WBO, Ring and lineal light welterweight titles between 2015 and 2017.

In August 2017, Crawford had a short reign as the undisputed light welterweight champion, prior to moving up to welterweight. He was the most recent undisputed titlist at light welterweight since Kostya Tszyu in 2004. Crawford became the first male boxer to simultaneously hold all four major world titles in boxing (WBA, WBC, IBF and WBO) since Jermain Taylor in 2005, and is one of only seven boxers in history to do so, male or female, together with Taylor, Bernard Hopkins (2004), Cecilia Brækhus (2014), Oleksandr Usyk (2018), Claressa Shields (2019) and Katie Taylor (2019).

As of December 2019, Crawford is ranked as the world's second best active boxer, pound for pound, by BoxRec and ESPN, and fourth by The Ring and the Transnational Boxing Rankings Board (TBRB). He is also ranked as the world's best active welterweight by Boxrec, second by The Ring, and third by ESPN and the TBRB. Crawford was named Fighter of the Year by the Boxing Writers Association of America in 2014, and by ESPN in 2014 and 2017.

Stylistically, Crawford is known for his exceptionally fast hand speed, punching power, counter-punching abilities and defensive skills, as well as his ability to comfortably switch hit from orthodox to southpaw.