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With 17 weight classes in boxing and four major sanctioning bodies that bestow world titles, keeping track of who holds each of the belts can be difficult -- especially when there are sometimes multiple titlists in each organization because of interim and secondary belts.
To make it easier for boxing fans, below is a quick reference chart of who holds each of the titles in the four organizations
To check the top 10 fighters in each division, visit ESPN's divisional rankings.
For a list of the best fighters regardless of weight class, check ESPN's pound-for-pound rankings.
Heavyweight (Unlimited)WBO: Oleksandr Usyk*
IBF: Oleksandr Usyk
WBA: Oleksandr Usyk**
WBC: Tyson Fury
*Joseph Parker is the WBO interim heavyweight champion
**Mahmoud Charr is the WBA "regular" heavyweight champion
Cruiserweight (200 lbs.)WBO: Chris Billam-Smith
IBF: Vacant
WBA: Gilberto Ramirez
WBC: Norair Mikaeljan
Light heavyweight (175 lbs.)WBO: Artur Beterbiev
IBF: Artur Beterbiev
WBA: Dmitry Bivol
WBC: Artur Beterbiev
Super middleweight (168 lbs.)WBO: Canelo Alvarez
IBF: Canelo Alvarez
WBA: Canelo Alvarez*
WBC: Canelo Alvarez**
*David Morrell is the WBA "regular" super middleweight champion
**David Benavidez is the WBC interim super middleweight champion
Middleweight (160 lbs.)WBO: Janibek Alimkhanuly
IBF: Janibek Alimkhanuly
WBA: Erislandy Lara
WBC: Jermall Charlo*
*Carlos Adames is the WBC interim middleweight champion
Junior middleweight (154 lbs.)WBO: Sebastian Fundora
IBF: Vacant
WBA: Israil Madrimov*
WBC: Sebastian Fundora**
*Jermell Charlo is the WBA "super" junior middleweight champion in recess
**Jermell Charlo is the WBC junior middleweight champion in recess. Serhii Bohachuk is the WBC interim junior middleweight champion
Welterweight (147 lbs.)WBO: Terence Crawford
IBF: Jaron Ennis
WBA: Terence Crawford
WBC: Terence Crawford*
*Mario Barrios is the WBC interim welterweight champion
Junior welterweight (140 lbs.)WBO: Teofimo Lopez Jr.
IBF: Subriel Matias
WBA: Isaac Cruz*
WBC: Devin Haney
*Ismael Barroso is the WBA interim junior welterweight champion
Lightweight (135 lbs.)WBO: Vacant
IBF: Vacant
WBA: Gervonta Davis
WBC: Shakur Stevenson
Junior lightweight (130 lbs.)WBO: Emanuel Navarrete*
IBF: Joe Cordina
WBA: Lamont Roach
WBC: O'Shaquie Foster
*Oscar Valdez is the WBO interim junior lightweight champion
Featherweight (126 lbs.)WBO: Rafael Espinoza
IBF: Luis Alberto Lopez
WBA: Raymond Ford
WBC: Rey Vargas*
*Brandon Figueroa is the WBC interim featherweight champion
Junior featherweight (122 lbs.)WBO: Naoya Inoue
IBF: Naoya Inoue
WBA: Naoya Inoue
WBC: Naoya Inoue
Bantamweight (118 lbs.)WBO: Jason Moloney
IBF: Emmanuel Rodriguez
WBA: Takuma Inoue
WBC: Junto Nakatani
Junior bantamweight (115 lbs.)WBO: Kosei Tanaka
IBF: Fernando Martinez
WBA: Kazuto Ioka
WBC: Juan Francisco Estrada*
*Carlos Cuadras is the WBC interim junior bantamweight champion
Flyweight (112 lbs.)WBO: Jesse Rodriguez
IBF: Vacant
WBA: Seigo Yuri Akui
WBC: Julio Cesar Martinez
Junior flyweight (108 lbs.)WBO: Jonathan Gonzalez
IBF: Sivenathi Nontshinga
WBA: Kenshiro Teraji
WBC: Kenshiro Teraji
Strawweight (105 lbs.)WBO: Oscar Collazo
IBF: Ginjiro Shigeoka
WBA: Knockout CP Freshmart
WBC: Yudai Shigeoka