List of world cruiserweight boxing champions

Championship recognition

• The World Boxing Association, founded in 1921 as the National Boxing Association,
• The World Boxing Council, founded in 1963,
• The International Boxing Federation, founded in 1983,
• The World Boxing Organization, founded in 1988,

  Cruiserweight champions who won belts in other divisions

• Braxton, Jack, Michalczewski, Hill, Erdei, Adamek, Shumenov and Tiozzo all were light-heavyweight champions.
• Holyfield, Haye, and Usyk are the only former cruiserweight champions to win the heavyweight title with Holyfield and Usyk earning recognition as undisputed champions in both divisions.
• Toney won titles at middleweight and super middleweight. He also defeated John Ruiz in an attempt to win the heavyweight title but failed a post-fight drug test and the result was changed to a No Decision.
• Jack won titles at super middleweight.