List of undisputed world boxing champions

This is a list of undisputed champions in professional boxing. Eras that are not listed do not have any undisputed champions.

Championship recognition
Titles have been awarded by:
 * New York State Athletic Commission (NYSAC), founded in 1920
 * World Boxing Association (WBA), founded in 1921 as the National Boxing Association (NBA); renamed to the WBA in 1962
 * World Boxing Council (WBC), founded in 1963
 * International Boxing Federation (IBF), founded in 1983
 * World Boxing Organization (WBO), founded in 1988

Criteria

 * 1921–1963, a boxer who held both the NYSAC and NBA (WBA) world titles simultaneously
 * 1963–1983, a boxer who held both the WBA and WBC world titles simultaneously
 * 1983–2007, a boxer who held the WBA, WBC, and IBF world titles simultaneously
 * 2007–present, a boxer who holds the WBA, WBC, IBF and WBO world titles simultaneously

Super flyweight
To date, there has never been an undisputed champion in this division.

Light flyweight
To date, there has never been an undisputed champion in this division.

Mini flyweight
To date, there has never been an undisputed champion in this division.

List of champions in multiple weight classes
Below is a list of boxers that held undisputed championship in at least two different weight classes. As of May 26, 2024, Henry Armstrong remains the only boxer to have held the claim in three weight classes.