List of IBO world champions

• ^r – Champion relinquished title
• ^s – Champion stripped of title

Heavyweight

No.	Name	Duration of reign	Defenses
1	Cruiserweight Source: No. Name Duration of reign Defenses 1 Light heavyweight Source: No. Name Duration of reign Defenses 1 Super middleweight Source: No. Name Duration of reign Defenses 1 Middleweight Source: No. Name Duration of reign Defenses 1 Super welterweight Source: No. Name Duration of reign Defenses 1 Welterweight Source: No. Name Duration of reign Defenses 1 Super lightweight Source: No. Name Duration of reign Defenses 1 Lightweight Source: No. Name Duration of reign Defenses 1 Super featherweight Source: No. Name Duration of reign Defenses 1 Featherweight Source: No. Name Duration of reign Defenses 1 Super bantamweight Source: No. Name Duration of reign Defenses 1 Bantamweight Source: No. Name Duration of reign Defenses 1 Super flyweight Source: No. Name Duration of reign Defenses 1 Flyweight Source: No. Name Duration of reign Defenses 1 Light flyweight Source: No. Name Duration of reign Defenses 1 Minimumweight Source: No. Name Duration of reign Defenses 1