This is a list of IBO world champions, showing every world champion certificated by the International Boxing Organization (IBO) since 1993.

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

Heavyweight

^[1]

No.	Name	Duration of reign	Defences
1	Pinklon Thomas	Nov 14, 1992 – Jan 29, 1993s	0
2	Lionel Butler	Feb 23, 1993 – Mar 1993s	0
3	Danell Nicholson	Aug 4, 1994 – Oct 1994r	0
4	Jimmy Thunder	Oct 29, 1994 – Jul 16, 1995s	2
5	Brian Nielsen	Jan 12, 1996 – Jun 18, 1999s	5
6	Lennox Lewis	Nov 13, 1999 – Apr 22, 2001	3
7	Hasim Rahman	Apr 22, 2001 – Nov 17, 2001	0
8	Lennox Lewis (2)	Nov 17, 2001 – Feb 6, 2004r	2
9	Wladimir Klitschko	Apr 22, 2006 – Nov 28, 2015	18
10	Tyson Fury	Nov 28, 2015 – Oct 12, 2016r	0
11	Anthony Joshua	Apr 29, 2017 – Jun 1, 2019	3
12	Andy Ruiz Jr.	Jun 1, 2019 – Dec 7, 2019	0
13	Anthony Joshua (2)	Dec 7, 2019 – Sep 25, 2021	1
14	Oleksandr Usyk	Sep 25, 2021 – present	2

Cruiserweight

^[2]

No.	Name	Duration of reign	Defences
1	David Izeqwire	Dec 28, 1993 – Nov 5, 1994	1
2	Adolpho Washington	Nov 5, 1994 – Mar 17, 1995s	0
3	Ted Cofie	Nov 3, 1995 – 1997r	0
4	Booker T. Word	Apr 18, 1997 – 1997r	0
5	James Toney	Jun 14, 1997 – 1998r	0
6	Robert Daniels	May 5, 1998 – 1999r	0
7	Thomas Hearns	Apr 10, 1999 – Apr 8, 2000	0
8	Uriah Grant	Apr 8, 2000 – Feb 3, 2001	0
9	Carl Thompson	Feb 3, 2001 – Nov 26, 2001	0
10	Ezra Sellers	Nov 26, 2001 – Apr 6, 2002s	0
11	Sebastiaan Rothmann	Oct 26, 2002 – Feb 6, 2004	1
12	Carl Thompson (2)	Feb 6, 2004 – Feb 2006s[3]	1
13	Tomasz Adamek	Jun 9, 2007 – 2008r	0
14	Johnathon Banks	Jul 12, 2008 – Feb 27, 2009s	0
15	Danny Green	Aug 15, 2009 – Jul 20, 2011	4
16	Antonio Tarver	Jul 20, 2011 – Jul 2012s	1
17	Danny Green (2)	Nov 21, 2012 – 2013r	0
18	Ola Afolabi	Nov 2, 2013 – 2015r	0
19	Rakhim Chakhkiev	May 22, 2015 – Nov 4, 2015	0
20	Ola Afolabi (2)	Nov 4, 2015 – Feb 27, 2016	0
21	Marco Huck	Feb 27, 2016 – Apr 1, 2017s	1
22	Kevin Lerena	Sep 9, 2017 – Nov 1, 2021s	6
23	Jack Massey	Nov 27, 2021 – November 1, 2022s	1
24	Yves Ngabu	Sep 09, 2023 – present	0

Light heavyweight

^[4]

No.	Name	Duration of reign	Defences
1	Lenny LaPaglia	Aug 20, 1993 – 1993r	0
2	Drake Thadzi	May 14, 1997 – Dec 12, 1998r	1
3	Roy Jones Jr.	Sep 9, 2000 – May 15, 2004	5
4	Antonio Tarver	May 15, 2004 – Dec 18, 2004	0
5	Glen Johnson	Dec 18, 2004 – Jun 18, 2005	0
6	Antonio Tarver (2)	Jun 18, 2005 – Jun 10, 2006	1
7	Bernard Hopkins	Jun 10, 2006 – 2007r	0
8	Antonio Tarver (3)	Jun 9, 2007 – Oct 11, 2008	2
9	Chad Dawson	Oct 11, 2008 – Aug 14, 2010	2
10	Jean Pascal	Aug 14, 2010 – May 21, 2011	1
11	Andrzej Fonfara	Nov 16, 2012 – 2013s	0
12	Blake Caparello	Oct 17, 2013 – 2014s	0
13	Thomas Oosthuizen	Mar 14, 2015 – Jun 5, 2015s	0
14	Umar Salamov	May 21, 2016 – May 17, 2017r	0
15	Igor Mikhalkin	May 19, 2017 – Mar 14, 2018r	1
16	Karo Murat	Mar 24, 2018 – Dec 15, 2018	0
17	Sven Fornling	Dec 15, 2018 – Nov 16, 2019	0
18	Dominic Boesel	Nov 16, 2019 – Oct 10, 2020	0
19	Robin Krasniqi	Oct 10, 2020 – Oct 09, 2021	0
20	Dominic Boesel (2)	Oct 09, 2021 – May 14, 2022s	0
21	Padraig McCrory	Oct 22, 2022 – -	0
22	Lyndon Arthur	Sep 01, 2023 – Dec 23, 2023	0
23	Dmitry Bivol	Dec 23, 2023 – Present	0

Super middleweight

^[5]

No.	Name	Duration of reign	Defences
1	Willie Ball	Jul 17, 1992 – Oct 9, 1992	0
2	Todd Nadon	Oct 9, 1992 – 1993r	0
3	Vinny Pazienza	Dec 28, 1993 – 1994r	0
4	Rick Thornberry	Apr 21, 1995 – 1996s	0
5	Karl Willis	Oct 13, 1996 – 1996s	0
6	Eddie White	Nov 27, 1996 – 1997s	0
7	Mads Larsen	May 2, 1997 – 1999r	4
8	Dana Rosenblatt	Nov 5, 1999 – 2000r	0
9	Adrian Dodson	Mar 3, 2001 – Apr 7, 2001	0
10	Ramon Arturo Brítez	Apr 7, 2001 – Dec 10, 2001	0
11	Brian Magee	Dec 10, 2001 – Jun 26, 2004	7
12	Robin Reid	Jun 26, 2004 – Aug 6, 2005	0
13	Jeff Lacy	Aug 6, 2005 – Mar 4, 2006s	1
14	Fulgencio Zúñiga	Sep 1, 2007 – 2008r	0
15	Sakio Bika	Nov 13, 2008 – 2010s	0
16	Isaac Chilemba	Jun 19, 2010 – 2011s	1
17	Thomas Oosthuizen	Mar 26, 2011 – 2014s	7
18	Donovan George	Aug 23, 2014 – 2014s	0
19	Zac Dunn	Jun 27, 2015 – 2016s	0
20	Renold Quinlan	Oct 14, 2016 – Feb 4, 2017	0
21	Chris Eubank Jr.	Feb 4, 2017 – Feb 17, 2018s	2
22	Chris Eubank Jr.(2)	Feb 23, 2019 – Dec 17, 2019r	0
23	Carlos Góngora	Dec 18, 2020 – Dec 18, 2021r [6]	1
24	Lerrone Richards	Dec 18, 2021 – 2022s [7]	0
25	Osleys Iglesias	Dec 9, 2022 – Present [8]	1

Middleweight

^[9]

No.	Name	Duration of reign	Defences
1	Glenwood Brown	Aug 25, 1995 – 1997r	0
2	Freeman Barr	Sep 20, 1997 – 1998r	1
3	Mpush Makambi	Sep 8, 1998 – Sep 30, 2000	3
4	Raymond Joval	Sep 30, 2000 – 2004s	4
5	Raymond Joval (2)	Jun 3, 2005 – 2006r	1
6	Daniel Geale	Dec 14, 2007 – May 27, 2009	1
7	Anthony Mundine	May 27, 2009 – 2009r	0
8	Peter Manfredo Jr.	May 22, 2010 – 2011s	0
9	Avtandil Khurtsidze	Mar 13, 2011 – 2011s	1
10	Gennady Golovkin	Dec 9, 2011 – Sep 15, 2018s	17
11	Gennady Golovkin (2)	Oct 5, 2019 – Jun 14, 2023r	2
12	Etinosa Oliha	Jul 1, 2023 – present	0

Super welterweight

^[10]

No.	Name	Duration of reign	Defences
1	Lonnie Beasley	Apr 10, 1993 – 1994r	0
2	Lester Ellis	Jul 17, 1995 – 1995s	0
3	Patrick Goossen	Jun 26, 1996 – 1996r	0
4	Manny Sobral	Dec 12, 1996 – 1997r	1
5	Adrian Stone	Apr 15, 2000 – 2001r	3
6	Richard Williams	Dec 1, 2002 – Jun 21, 2003	3
7	Sergio Martínez	Jun 21, 2003 – 2004r	2
8	Mihály Kótai	Jun 4, 2005 – Mar 3, 2006	1
9	Steve Conway	Mar 3, 2006 – Jun 3, 2006	0
10	Attila Kovács	Jun 3, 2006 – 2008s	1
11	Zaurbek Baysangurov	Dec 4, 2010 – 2012s	1
12	Zaurbek Baysangurov (2)	Apr 12, 2014 – 2015s	0
13	Erislandy Lara	Jun 12, 2015 – Apr 7, 2018	4
14	Jarrett Hurd	Apr 7, 2018 – May 11, 2019	1
15	Julian Williams	May 11, 2019 – Jan 18, 2020	0
16	Jeison Rosario	Jan 18, 2020 – Apr 1, 2020r	0
17	Erislandy Lara (2)	Aug 29, 2020 – Sep 1, 2021r	1
18	Sam Eggington	Jun 25, 2022 – Oct 8 2022	0
19	Dennis Hogan	Oct 8, 2022 – May 20, 2023	0
20	JJ Metcalf	May 20, 2023 – present	0

Welterweight

^[11]

No.	Name	Duration of reign	Defences
1	Kenny Gould	Jan 8, 1993 – 1993r	0
2	Johnny Bizzarro	Aug 18, 1993 – Aug 4, 1994	1
3	Roger Mayweather	Aug 4, 1994 – 1995r	1
4	Kip Diggs	Jun 30, 1995 – 1995r	0
5	Kevin Lueshing	Jul 17, 1996 – Jan 11, 1997s	0
6	José Antonio Rivera	Apr 25, 1997 – 1998r	0
7	Dingaan Thobela	Mar 6, 1999 – 1999r	0
8	Peter Malinga	Oct 22, 1999 – 2000r	0
9	Willy Wise	Dec 2, 2000 – Jun 11, 2001	0
10	Jawaid Khaliq	Jun 11, 2001 – Feb 2006s[3]	7
11	Floyd Mayweather Jr.	Apr 8, 2006 – 2007r	1
12	Isaac Hlatshwayo	May 12, 2007 – 2008r	2
13	Lovemore Ndou	Jul 11, 2009 – 2010s	2
14	Chris van Heerden	Sep 24, 2011 – 2014s	2
15	Ali Funeka	Nov 15, 2014 – Jul 24, 2015	0
16	Tsiko Mulovhedzi	Jul 24, 2015 – 2017s	1
17	Thulani Mbenge	Jun 25, 2018 – Jul 6, 2019	1
18	Sebastian Formella	Jul 6, 2019 – Aug 22, 2020s	1
19	Daniyar Yeleussinov	Dec 18, 2021 – Dec 27, 2022s	0

Super lightweight

^[12]

No.	Name	Duration of reign	Defences
1	Mike Evgen	Apr 9, 1992 – 1992r	0
2	Mike Johnson	Feb 19, 1993 – 1994r	1
3	Roger Mayweather	May 28, 1994 – 1994r	0
4	Lester Ellis	Dec 3, 1994 – 1995r	0
5	Mario Martínez	Jul 29, 1995 – 1995r	0
6	Darrell Hiles	Sep 23, 1995 – 1995r	0
7	Verdell Smith	Jan 18, 1996 – 1996r	0
8	Johar Abu Lashin	Feb 28, 1997 – 1997r	0
9	Israel Cardona	Apr 25, 1997 – 1997r	0
10	Ener Julio	Sep 12, 1998 – 1998r	1
11	Newton Villarreal	Feb 5, 2000 – Apr 7, 2001	2
12	Billy Schwer	Apr 7, 2001 – Jul 14, 2001	0
13	Pablo Daniel Sarmiento	Jul 14, 2001 – May 8, 2004	3
14	Colin Lynes	May 8, 2004 – 2005r	1
15	Stevie Johnston	Jan 27, 2006 – 2006r	0
16	Ricky Hatton	Jan 20, 2007 – May 2, 2009	3
17	Manny Pacquiao	May 2, 2009 – 2010s	0
18	Kaizer Mabuza	Mar 3, 2012 – Jun 20, 2012	0
19	Khabib Allakhverdiev	Jun 20, 2012 – Apr 12, 2014	2
20	Eduard Troyanovsky	Apr 10, 2015 – Dec 3, 2016	3
21	Julius Indongo	Dec 3, 2016 – Aug 7, 2017s	1
22	Mohamed Mimoune	Jan 20, 2018 – Apr 27, 2019s	1
23	Jeremias Ponce	Sep 14, 2019 – May 25, 2021	0
24	Zhankosh Turarov	March 21, 2023 – present	1

Lightweight

^[13]

No.	Name	Duration of reign	Defences
1	Anthony Boyle	Dec 28, 1993 – 1994r	0
2	Amado Cabato	Dec 11, 1994 – Mar 10, 1995	0
3	Lester Ellis	Mar 10, 1995 – 1995r	0
4	Billy Irwin	Jun 8, 1995 – 1995r	0
5	Leavander Johnson	Jul 29, 1995 – 1996r	0
6	Tony Pep	Mar 7, 1996 – 1997r	1
7	Michael Ayers	Mar 12, 1999 – Dec 26, 2001r	6
8	Jason Cook	Nov 8, 2003 – Nov 5, 2004	1
9	Aldo Nazareno Ríos	Nov 5, 2004 – 2005r	0
10	Isaac Hlatshwayo	Aug 31, 2005 – 2006r	2
11	Juan Díaz	Sep 6, 2008 – Feb 28, 2009s	0
12	Mlungisi Dlamini	Oct 31, 2009 – Jan 29, 2010 (died in a vehicular accident)	0
13	Leonardo Zappavigna	Mar 6, 2010 – 2010s	0
14	Emiliano Marsili	Jan 20, 2012 – 2012s	0
15	Daud Yordan	Jul 6, 2013 – 2014s	1
16	Xolisani Ndongeni	Nov 28, 2015 – 2016s	0
17	Emmanuel Tagoe	Dec 2, 2016 – Jun 13, 2018s	1
18	Jovanni Straffon	May 1, 2021 – Sep 4, 2021	0
19	Maxi Hughes	Sep 4, 2021 – Jul 22, 2023	2
20	George Kambosos Jr	Jul 22, 2023 – present	0

Super featherweight

^[14]

No.	Name	Duration of reign	Defences
1	John Roby	Apr 3, 1993 – Apr 21, 1994	0
2	Jeff Mayweather	Apr 21, 1994 – Aug 25, 1995	2
3	Israel Cardona	Aug 25, 1995 – 1995r	0
4	Jimmi Bredahl	Mar 29, 1996 – 1996r	0
5	Israel Cardona (2)	Apr 12, 1996 – 1996r	0
6	Troy Dorsey	Oct 18, 1996 – 1997r	0
7	Charles Shepherd	Jul 31, 1999 – Feb 26, 2000	0
8	Affif Djelti	Feb 26, 2000 – 2002r	3
9	Cassius Baloyi	Apr 17, 2002 – Jul 29, 2006	5
10	Gairy St Clair	Jul 29, 2006 – Nov 4, 2006s	0
11	Cassius Baloyi (2)	Feb 3, 2007 – 2007r	0
12	Billy Dib	Jul 30, 2008 – 2008s	0
13	Zolani Marali	Apr 2, 2009 – Sep 12, 2009	0
14	Kim Ji-hoon	Sep 12, 2009 – 2010r	0
15	Will Tomlinson	Nov 30, 2011 – 2014s	3
16	José Pedraza	Mar 22, 2014 – 2014s	0
17	Jack Asis	Apr 11, 2015 – Aug 5, 2016	0
18	Malcolm Klassen	Aug 5, 2016 – Aug 5, 2017s	0
19	Shavkat Rakhimov	Sep 9, 2017 – Oct 1, 2019r	3
20	Michael Magnesi	Nov 27, 2020 – Sep 24, 2022	1
21	Anthony Cacace	Sep 24, 2022 – present	1

Featherweight

^[15]

No.	Name	Duration of reign	Defences
1	Derrick Gainer	Nov 30, 1993 – 1994r	0
2	Radford Beasley	Sep 26, 1997 – 1998r	0
3	Junior Jones	Apr 10, 1999 – 1999r	0
4	Marco Antonio Barrera	Apr 7, 2001 – 2002r	0
5	Naseem Hamed	May 18, 2002 – 2002r	0
6	Michael Brodie	Jun 21, 2003 – 2003r	0
7	Vuyani Bungu	Feb 7, 2004 – Jun 25, 2005	0
8	Thomas Mashaba	Jun 25, 2005 – Mar 7, 2008	4
9	Cristóbal Cruz	Mar 7, 2008 – 2008r	0
10	Fernando Beltrán Jr.	Aug 22, 2008 – 2009r	0
11	Jackson Asiku	Nov 6, 2009 – Sep 15, 2010	0
12	Jhonny González	Sep 15, 2010 – 2011s	0
13	Daud Yordan	May 5, 2012 – Apr 14, 2013	1
14	Simpiwe Vetyeka	Apr 14, 2013 – 2014s	1
15	Lusanda Komanisi	Jul 18, 2014 – 2016s	2
16	Claudio Marrero	Apr 29, 2017 – Sep 15, 2017s	0
17	Tugstsogt Nyambayar	Jan 26, 2019 – Feb 8, 2020r	0
18	Jazza Dickens	Oct 15, 2022 – Jul 22, 2023	0
19	Hector Andres Sosa	Jul 22, 2023 – Present	0

Super bantamweight

^[16]

No.	Name	Duration of reign	Defences
1	John Lowey	Apr 20, 1995 – 1995r	0
2	Serhiy Divakov	May 21, 1996 – 1997r	0
3	Patrick Mullings	Mar 28, 1998 – Aug 8, 1998	0
4	Simon Ramoni	Aug 8, 1998 – 2001r	3
5	Paulie Ayala	Aug 4, 2001 – 2002r	1
6	Zolani Marali	Jul 11, 2003 – May 22, 2004	0
7	Thomas Mashaba	May 22, 2004 – 2005r	0
8	Takalani Ndlovu	Nov 4, 2005 – Jul 14, 2007s	3
9	Mike Oliver	Nov 8, 2007 – 2008r	0
10	Tshifhiwa Munyai	Mar 26, 2011 – 2012r	0
11	Alexander Bakhtin	Sep 18, 2012 – Apr 20, 2013r	0
12	Thabo Sonjica	Jul 6, 2013 – Aug 8, 2014s	1
13	Paulus Ambunda	Aug 1, 2015 – Jun 11, 2016	1
14	Moises Flores	Jun 11, 2016 – Jun 17, 2017s	0
15	Paulus Ambunda	Sep 21, 2018 – May 11, 2019	0
16	Stephen Fulton	May 11, 2019 – Jan 25, 2020r	0
17	Ludumo Lamati	Jun 19, 2021 – May 24, 2022r	0
18	Eric Robles Ayala	July 21, 2023 – present	0

Bantamweight

^[17]

No.	Name	Duration of reign	Defences
1	Johnny Bredahl	Feb 16, 1996 – Jun 5, 1998r	7
2	Noel Wilders	Mar 20, 2000 – 2001r	1
3	José Sanjuanelo	Jul 14, 2001 – Mar 2, 2002	1
4	Silence Mabuza	Mar 2, 2002 – Nov 5, 2005	6
5	Rafael Márquez	Nov 5, 2005 – 2006r	1
6	Silence Mabuza (2)	May 12, 2007 – 2009r	2
7	Simpiwe Vetyeka	Jul 11, 2009 – 2010r	0
8	Vic Darchinyan	May 20, 2010 – Dec 11, 2010s	0
9	Vic Darchinyan (2)	Apr 23, 2011 – Dec 3, 2011s	1
10	Joseph Agbeko	Mar 22, 2013 – 2013s	0
11	Juan Carlos Payano	Aug 2, 2015 – Jun 18, 2016	0
12	Rau'shee Warren	Jun 18, 2016 – Feb 10, 2017s	0
13	Michael Dasmariñas	Apr 20, 2018 – 2019s	0
14	Michell Banquez	Jul 12, 2019 – 2021s	0
15	Prince Patel	Dec 19, 2023 – present	0

Super flyweight

^[18]

No.	Name	Duration of reign	Defences
1	Ángel Almena	Jul 29, 1995 – 1995r	0
2	Ilido Julio	Sep 19, 1998 – Jan 8, 1999	0
3	Edison Torres	Jan 8, 1999 – Apr 3, 1999	0
4	Mauricio Pastrana	Apr 3, 1999 – 1999r	0
5	Lunga Ntontela	Dec 13, 2002 – 2003r	0
6	Jason Booth	Sep 20, 2003 – Dec 17, 2004	1
7	Damaen Kelly	Dec 17, 2004 – February 2006s[3]	0
8	Mbwana Matumla	Nov 4, 2006 – 2007r	0
9	Vic Darchinyan	Oct 20, 2007 – 2008r	0
10	Zolile Mbityi	May 31, 2008 – 2009r	0
11	Gideon Buthelezi	Nov 10, 2012 – Jun 15, 2013	0
12	Edrin Dapudong	Jun 15, 2013 – Jul 18, 2014	0
13	Lwandile Sityatha	Jul 18, 2014 – 2015r	2
14	Gideon Buthelezi (2)	Dec 18, 2015 – Nov 1, 2021s	3

Flyweight

^[19]

No.	Name	Duration of reign	Defences
1	Scotty Olson	Dec 9, 1994 – 1998r	5
2	Zolile Mbityi	Oct 22, 1999 – Sep 30, 2000	1
3	Damaen Kelly	Sep 30, 2000 – Nov 21, 2001s	1
4	Masibulele Makepula	Jan 26, 2002 – Sep 14, 2002	0
5	Mzukisi Sikali	Sep 14, 2002 – Mar 27, 2005	2
6	Vic Darchinyan	Mar 27, 2005 – Jul 7, 2007	5
7	Nonito Donaire	Jul 7, 2007 – 2009r	3
8	César Seda	Sep 18, 2009 – 2010s	0
9	Moruti Mthalane	Mar 15, 2014 – 2017s	3
10	Maximino Flores	Aug 25, 2019 – 2022	0
11	Dave Apolinario	July 29, 2022 – present	0

Light flyweight

^[20]

No.	Name	Duration of reign	Defences
1	José Sanjuanelo	Nov 7, 1998 – Aug 26, 2000	0
2	José García Bernal	Aug 26, 2000 – Apr 17, 2002	1
3	Monelisi Mhikiza Myekeni	Apr 17, 2002 – 2004s	1
4	Hekkie Budler	Feb 27, 2010 – Jan 27, 2011	1
5	Gideon Buthelezi	Jan 27, 2012 – Sep 24, 2011s	0
6	Rey Loreto	Feb 1, 2014 – 2016s	1
7	Hekkie Budler (2)	Feb 4, 2017 – Sep 16, 2017s	0
8	Tibo Monabesa	Jul 7, 2019 – Mar 1, 2019r	0

Minimumweight

^[21]

No.	Name	Duration of reign	Defences
1	Noel Tuñacao	Mar 8, 2003 – Dec 16, 2003r	0
2	Nkosinathi Joyi	Nov 4, 2006 – Jun 2009s	3
3	Gideon Buthelezi	Jun 19, 2010 – Jan 27, 2011r	0
4	Hekkie Budler	Sep 24, 2011 – Mar 19, 2016s	8
5	Simphiwe Khonco	Jun 11, 2016 – Oct 1, 2019r	4
6	Nkosinathi Joyi (2)	Dec 16, 2019 – May 20, 2021s	0
7	Ayanda Ndulani	May 21, 2021 – present	1