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:

Criteria

Heavyweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Cruiserweight

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Light heavyweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Super middleweight

WBA–WBC–IBF–WBO era (2007–present)

Middleweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

Light middleweight

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Welterweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Light welterweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Lightweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF era (1983–2007)

WBA–WBC–IBF–WBO era (2007–present)

Super featherweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

Featherweight

NYSAC–NBA era (1922–1963)

WBA–WBC era (1963–1983)

Super bantamweight

WBA–WBC–IBF–WBO era (2007–present)

Bantamweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

WBA–WBC–IBF–WBO era (2007–present)

Super flyweight

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

Flyweight

NYSAC–NBA era (1921–1963)

WBA–WBC era (1963–1983)

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 have held the undisputed championship in at least two different weight classes. Henry Armstrong remains the only boxer to have held the claim in three weight classes.