List of IBO world champions

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

  Heavyweight

No.	Name	Duration of reign	Defences
1	Pinklon Thomas	Nov 14, 1992 – Jan 29, 1993s	0
2	Lionel Butler	Feb 23, 1993 – Mar 1993r	0
3	Danell Nicholson	Aug 4, 1994 – Oct 1994r	0
4	Jimmy Thunder	Oct 29, 1994 – Jul 16, 1995r	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	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	Dec 7, 2019 – present	0

Cruiserweight

No.	Name	Duration of reign	Defences
1	David Izeqwire	1993-12-28 – 1994-11-05	1
2	Adolpho Washington	1994-11-05 – 1995-03-17s	0
3	Ted Cofie	1995-11-03 – 1997r	0
4	Booker T. Word	1997-04-18 – 1997r	0
5	James Toney	1997-06-14 – 1998r	0
6	Robert Daniels	1998-05-05 – 1999r	0
7	Thomas Hearns	1999-04-10 – 2000-04-08	0
8	Uriah Grant	2000-04-08 – 2001-02-03	0
9	Carl Thompson	2001-02-03 – 2001-11-26	0
10	Ezra Sellers	2001-11-26 – 2002-04-06s	0
11	Sebastiaan Rothmann	2002-10-26 – 2004-02-06	1
12	Carl Thompson	2004-02-06 – February 2006s	1
13	Tomasz Adamek	2007-06-09 – 2008r	0
14	Johnathon Banks	2008-07-12 – 2009-02-27s	0
15	Danny Green	2009-08-15 – 2011-07-20	4
16	Antonio Tarver	2011-07-20 – July 2012s	1
17	Danny Green	2012-11-21 – 2013r	0
18	Ola Afolabi	2013-11-02 – 2015r	0
19	Rakhim Chakhkiev	2015-05-22 – 2015-11-04	0
20	Ola Afolabi	2015-11-04 – 2016-02-27	0
21	Marco Huck	2016-02-27 – 2017-04-01s	1
22	Kevin Lerena	2017-09-09 – present	5

Light heavyweight

No.	Name	Duration of reign	Defences
1	Lenny LaPaglia	1993-08-20 – 1993r	0
2	Drake Thadzi	1997-05-14 – 1998-12-12r	1
3	Roy Jones Jr.	2000-09-09 – 2004-05-15	5
4	Antonio Tarver	2004-05-15 – 2004-12-18	0
5	Glen Johnson	2004-12-18 – 2005-06-18	0
6	Antonio Tarver	2005-06-18 – 2006-06-10	1
7	Bernard Hopkins	2006-06-10 – 2007r	0
8	Antonio Tarver	2007-06-09 – 2008-10-11	2
9	Chad Dawson	2008-10-11 – 2010-08-14	2
10	Jean Pascal	2010-08-14 – 2011-05-21	1
11	Andrzej Fonfara	2012-11-16 – 2013s	0
12	Blake Caparello	2013-10-17 – 2014s	0
13	Thomas Oosthuizen	2015-03-14 – 2015-06-05s	0
14	Umar Salamov	2016-05-21 – 2017-05-17r	0
15	Igor Mikhalkin	2017-05-19 – 2018-03-14r	1
16	Karo Murat	2018-03-24 – 2018-12-15	0
17	Sven Fornling	2018-12-15 – 2019-11-16	0
18	Dominic Boesel	2019-11-16 – present	0

Super middleweight

No.	Name	Duration of reign	Defences
1	Willie Ball	1992-07-17 – 1992-10-09	0
2	Todd Nadon	1992-10-09 – 1993r	0
3	Vinny Pazienza	1993-12-28 – 1994r	0
4	Rick Thornberry	1995-04-21 – 1996s	0
5	Karl Willis	1996-10-13 – 1996s	0
6	Eddie White	1996-11-27 – 1997s	0
7	Mads Larsen	1997-05-02 – 1999r	4
8	Dana Rosenblatt	1999-11-05 – 2000r	0
9	Adrian Dodson	2001-03-03 – 2001-04-07	0
10	Ramon Arturo Brítez	2001-04-07 – 2001-12-10	0
11	Brian Magee	2001-12-10 – 2004-06-26	7
12	Robin Reid	2004-06-26 – 2005-08-06	0
13	Jeff Lacy	2005-08-06 – 2006-03-04s	1
14	Fulgencio Zúñiga	2007-09-01 – 2008r	0
15	Sakio Bika	2008-11-13 – 2010s	0
16	Isaac Chilemba	2010-06-19 – 2011s	1
17	Thomas Oosthuizen	2011-03-26 – 2014s	7
18	Donovan George	2014-08-23 – 2014s	0
19	Zac Dunn	2015-06-27 – 2016s	0
20	Renold Quinlan	2016-10-14 – 2017-02-04	0
21	Chris Eubank Jr.	2017-02-04 – 2018-02-17s	2
22	Chris Eubank Jr.	2019-02-23 - 2019-12-17r	0

Middleweight

No.	Name	Duration of reign	Defences
1	Glenwood Brown	1995-08-25 – 1997r	0
2	Freeman Barr	1997-09-20 – 1998r	1
3	Mpush Makambi	1998-09-08 – 2000-09-30	3
4	Raymond Joval	2000-09-30 – 2004s	4
5	Raymond Joval	2005-06-03 – 2006r	1
6	Daniel Geale	2007-12-14 – 2009-05-27	1
7	Anthony Mundine	2009-05-27 – 2009r	0
8	Peter Manfredo Jr.	2010-05-22 – 2011s	0
9	Avtandil Khurtsidze	2011-03-13 – 2011s	1
10	Gennady Golovkin	2011-12-09 – 2018-09-15	17
11	Gennady Golovkin	2019-10-05 – present	0

Super welterweight

No.	Name	Duration of reign	Defences
1	Lonnie Beasley	1993-04-10 – 1994r	0
2	Lester Ellis	1995-07-17 – 1995s	0
3	Patrick Goossen	1996-06-26 – 1996r	0
4	Manny Sobral	1996-12-12 – 1997r	1
5	Adrian Stone	2000-04-15 – 2001r	3
6	Richard Williams	2001-12-01 – 2003-06-21	3
7	Sergio Martínez	2003-06-21 – 2004r	2
8	Mihály Kótai	2005-06-04 – 2006-03-03	1
9	Steve Conway	2006-03-03 – 2006-06-03	0
10	Attila Kovács	2006-06-03 – 2008s	1
11	Zaurbek Baysangurov	2010-12-04 – 2012s	1
12	Zaurbek Baysangurov	2014-04-12 – 2015s	0
13	Erislandy Lara	2015-06-12 – 2018-04-07	4
14	Jarrett Hurd	2018-04-07 - 2019-05-11	1
15	Julian Williams	2019-05-11 – 2020-01-18	0
16	Jeison Rosario	2020-01-18 – 2020-04-01r	0

Welterweight

No.	Name	Duration of reign	Defences
1	Kenny Gould	1993-01-08 – 1993r	0
2	Johnny Bizzarro	1993-08-18 – 1994-08-04	1
3	Roger Mayweather	1994-08-04 – 1995r	1
4	Kip Diggs	1995-06-30 – 1995r	0
5	Kevin Lueshing	1996-07-17 – 1997-01-11s	0
6	José Antonio Rivera	1997-04-25 – 1998r	0
7	Dingaan Thobela	1999-03-06 – 1999r	0
8	Peter Malinga	1999-10-22 – 2000r	0
9	Willy Wise	2000-12-02 – 2001-06-11	0
10	Jawaid Khaliq	2001-06-11 – February 2006s	7
11	Floyd Mayweather Jr.	2006-04-08 – 2007r	1
12	Isaac Hlatshwayo	2007-05-12 – 2008r	2
13	Lovemore Ndou	2009-07-11 – 2010s	2
14	Chris van Heerden	2011-09-24 – 2014s	2
15	Ali Funeka	2014-11-15 – 2015-07-24	0
16	Tsiko Mulovhedzi	2015-07-24 – 2017s	1
17	Thulani Mbenge	2018-06-25 – 2019-07-06	1
18	Sebastian Formella	2019-07-06 – present	1

Super lightweight

No.	Name	Duration of reign	Defences
1	Mike Evgen	1992-04-09 – 1992r	0
2	Mike Johnson	1993-02-19 – 1994r	1
3	Roger Mayweather	1994-05-28 – 1994r	0
4	Lester Ellis	1994-12-03 – 1995r	0
5	Mario Martínez	1995-07-29 – 1995r	0
6	Darrell Hiles	1995-09-23 – 1995r	0
7	Verdell Smith	1996-01-18 – 1996r	0
8	Johar Abu Lashin	1997-02-28 – 1997r	0
9	Israel Cardona	1997-04-25 – 1997r	0
10	Ener Julio	1998-09-12 – 1998r	1
11	Newton Villarreal	2000-02-05 – 2001-04-07	2
12	Billy Schwer	2001-04-07 – 2001-07-14	0
13	Pablo Daniel Sarmiento	2001-07-14 – 2004-05-08	3
14	Colin Lynes	2004-05-08 – 2005r	1
15	Stevie Johnston	2006-01-27 – 2006r	0
16	Ricky Hatton	2007-01-20 – 2009-05-02	3
17	Manny Pacquiao	2009-05-02 – 2010s	0
18	Kaizer Mabuza	2012-03-03 – 2012-06-20	0
19	Khabib Allakhverdiev	2012-06-20 – 2014-04-12	2
20	Eduard Troyanovsky	2015-04-10 – 2016-12-03	3
21	Julius Indongo	2016-12-03 – 2017-08-07s	1
22	Mohamed Mimoune	2018-01-20 – 2019-04-27s	1
23	Jeremias Nicolas Ponce	2019-09-14 – present	0

Lightweight

No.	Name	Duration of reign	Defences
1	Anthony Boyle	1993-12-28 – 1994r	0
2	Amado Cabato	1994-12-11 – 1995-03-10	0
3	Lester Ellis	1995-03-10 – 1995r	0
4	Billy Irwin	1995-06-08 – 1995r	0
5	Leavander Johnson	1995-07-29 – 1996r	0
6	Tony Pep	1996-03-07 – 1997r	1
7	Michael Ayers	1999-03-12 – 2001-12-26r	6
8	Jason Cook	2003-11-08 – 2004-11-05	1
9	Aldo Nazareno Ríos	2004-11-05 – 2005r	0
10	Isaac Hlatshwayo	2005-08-31 – 2006r	2
11	Juan Díaz	2008-09-06 – 2009-02-28s	0
12	Mlungisi Dlamini	2009-10-31 – 2010-01-29	0
13	Leonardo Zappavigna	2010-03-06 – 2010s	0
14	Emiliano Marsili	2012-01-20 – 2012s	0
15	Daud Yordan	2013-07-06 – 2014s	1
16	Xolisani Ndongeni	2015-11-28 – 2016s	0
17	Emmanuel Tagoe	2016-12-02 – 2018-06-13s	1

Super featherweight

No.	Name	Duration of reign	Defences
1	John Roby	1993-04-03 – 1994-04-21	0
2	Jeff Mayweather	1994-04-21 – 1995-08-25	2
3	Israel Cardona	1995-08-25 – 1995r	0
4	Jimmi Bredahl	1996-03-29 – 1996r	0
5	Israel Cardona	1996-04-12 – 1996r	0
6	Troy Dorsey	1996-10-18 – 1997r	0
7	Charles Shepherd	1999-07-31 – 2000-02-26	0
8	Affif Djelti	2000-02-26 – 2002r	3
9	Cassius Baloyi	2002-04-17 – 2006-07-29	5
10	Gairy St Clair	2006-07-29 – 2006-11-04s	0
11	Cassius Baloyi	2007-02-03 – 2007r	0
12	Billy Dib	2008-07-30 – 2008s	0
13	Zolani Marali	2009-04-02 – 2009-09-12	0
14	Kim Ji-hoon	2009-09-12 – 2010r	0
15	Will Tomlinson	2011-11-30 – 2014s	3
16	José Pedraza	2014-03-22 – 2014s	0
17	Jack Asis	2015-04-11 – 2016-08-05	0
18	Malcolm Klassen	2016-08-05 – 2017-08-05s	0
19	Shavkat Rakhimov	2017-09-09 – 2019-10-01r	3

Featherweight

No.	Name	Duration of reign	Defences
1	Derrick Gainer	1993-11-30 – 1994r	0
2	Radford Beasley	1997-09-26 – 1998r	0
3	Junior Jones	1999-04-10 – 1999r	0
4	Marco Antonio Barrera	2001-04-07 – 2002r	0
5	Naseem Hamed	2002-05-18 – 2002r	0
6	Michael Brodie	2003-06-21 – 2003r	0
7	Vuyani Bungu	2004-02-07 – 2005-06-25	0
8	Thomas Mashaba	2005-06-25 – 2008-03-07	4
9	Cristóbal Cruz	2008-03-07 – 2008r	0
10	Fernando Beltrán, Jr.	2008-08-22 – 2009r	0
11	Jackson Asiku	2009-11-06 – 2010-09-15	0
12	Jhonny González	2010-09-15 – 2011s	0
13	Daud Yordan	2012-05-05 – 2013-04-14	1
14	Simpiwe Vetyeka	2013-04-14 – 2014s	1
15	Lusanda Komanisi	2014-07-18 – 2016s	2
16	Claudio Marrero	2017-04-29 – 2017-09-15s	0
17	Tugstsogt Nyambayar	2019-01-26 – 2020-02-08s	0

Super bantamweight

No.	Name	Duration of reign	Defences
1	John Lowey	1995-04-20 – 1995r	0
2	Serhiy Divakov	1996-05-21 – 1997r	0
3	Patrick Mullings	1998-03-28 – 1998-08-08	0
4	Simon Ramoni	1998-08-08 – 2001r	3
5	Paulie Ayala	2001-08-04 – 2002r	1
6	Zolani Marali	2003-07-11 – 2004-05-22	0
7	Thomas Mashaba	2004-05-22 – 2005r	0
8	Takalani Ndlovu	2005-11-04 – 2007-07-14s	3
9	Mike Oliver	2007-11-08 – 2008r	0
10	Tshifhiwa Munyai	2011-03-26 – 2012r	0
11	Alexander Bakhtin	2012-09-18 – 2013-04-20r	0
12	Thabo Sonjica	2013-07-06 – 2014-08-08s	1
13	Paulus Ambunda	2015-08-01 – 2016-06-11	1
14	Moises Flores	2016-06-11 – 2017-06-17s	0
15	Paulus Ambunda	2018-09-21 – 2019-05-11	0
16	Stephen Fulton	2019-05-11 – 2020-01-25r	0

Bantamweight

No.	Name	Duration of reign	Defences
1	Johnny Bredahl	1996-02-16 – 1998-06-05r	7
2	Noel Wilders	2000-03-20 – 2001r	1
3	José Sanjuanelo	2001-07-14 – 2002-03-02	1
4	Silence Mabuza	2002-03-02 – 2005-11-05	6
5	Rafael Márquez	2005-11-05 – 2006r	1
6	Silence Mabuza	2007-05-12 – 2009r	2
7	Simpiwe Vetyeka	2009-07-11 – 2010r	0
8	Vic Darchinyan	2010-05-20 – 2010-12-11s	0
9	Vic Darchinyan	2011-04-23 – 2011-12-03s	1
10	Joseph Agbeko	2013-03-22 – 2013s	0
11	Juan Carlos Payano	2015-08-02 – 2016-06-18	0
12	Rau'shee Warren	2016-06-18 – 2017-02-10s	0
13	Michael Dasmarinas	2018-04-20 – 2019s	0
14	Michell Banquez	2019-07-12 – present	0

Super flyweight

No.	Name	Duration of reign	Defences
1	Ángel Almena	1995-07-29 – 1995r	0
2	Ilido Julio	1998-09-19 – 1999-01-08	0
3	Edison Torres	1999-01-08 – 1999-04-03	0
4	Mauricio Pastrana	1999-04-03 – 1999r	0
5	Lunga Ntontela	2002-12-13 – 2003r	0
6	Jason Booth	2003-09-20 – 2004-12-17	1
7	Damaen Kelly	2004-12-17 – February 2006s	0
8	Mbwana Matumla	2006-11-04 – 2007r	0
9	Vic Darchinyan	2007-10-20 – 2008r	0
10	Zolile Mbityi	2008-05-31 – 2009r	0
11	Gideon Buthelezi	2012-11-10 – 2013-06-15	0
12	Edrin Dapudong	2013-06-15 – 2014-07-18	0
13	Lwandile Sityatha	2014-07-18 – 2015r	2
14	Gideon Buthelezi	2015-12-18 – present	3

Flyweight

No.	Name	Duration of reign	Defences
1	Scotty Olson	1994-12-09 – 1998r	5
2	Zolile Mbityi	1999-10-22 – 2000-09-30	1
3	Damaen Kelly	2000-09-30 – 2001-11-21s	1
4	Masibulele Makepula	2002-01-26 – 2002-09-14	0
5	Mzukisi Sikali	2002-09-14 – 2005-03-27	2
6	Vic Darchinyan	2005-03-27 – 2007-07-07	5
7	Nonito Donaire	2007-07-07 – 2009r	3
8	César Seda	2009-09-18 – 2010s	0
9	Moruti Mthalane	2014-03-15 – 2017s	3
10	Maximino Flores	2019-08-25 – present	0

Light flyweight

No.	Name	Duration of reign	Defences
1	José Sanjuanelo	1998-11-07 – 2000-08-26	0
2	José García Bernal	2000-08-26 – 2002-04-17	1
3	Monelisi Mhikiza Myekeni	2002-04-17 – 2004s	1
4	Hekkie Budler	2010-02-27 – 2011-01-27	1
5	Gideon Buthelezi	2011-01-27 – 2011-09-24s	0
6	Rey Loreto	2014-02-01 – 2016s	1
7	Hekkie Budler	2017-02-04 – 2017-09-16s	0
8	Tibo Monabesa	2019-07-07 – 2019-03-01r	0

Minimumweight

No.	Name	Duration of reign	Defences
1	Noel Tuñacao	2003-03-08 – 2003-12-16r	0
2	Nkosinathi Joyi	2006-11-04 – June 2009s	3
3	Gideon Buthelezi	2010-06-19 – 2011-01-27r	0
4	Hekkie Budler	2011-09-24 – 2016-03-19s	8
5	Simphiwe Khonco	2016-06-11 – 2019-10-01r	4
6	Nkosinathi Joyi	2019-12-16 – present	0