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| International Boxing Union | ( | 1910 | - | 1940s | ) |
| European Boxing Union | ( | 1946 | - | ) |
* Bolded letters in the competitor's name, if any, indicate the surname/family name.
| Joe Bowker | 1910-03-07 | London, ENG, GBR |
| Defeats Jean Audouy. | ||
| Digger Stanley | 1910-10-17 | London, ENG, GBR |
| Also wins the vacant British Title; also recognized the world champion by NSC. | ||
| Charles Ledoux | 1912-06-23 | Dieppe, FRA |
| Vacant when Ledoux serves in WWI between 14 and 18. | ||
| Tommy Noble | 1919-04-10 | London, ENG, GBR |
| British champion, defeats French champion Eugene Criqui; loses the British title to Walter Ross on 19-06-30 in London, ENG, GBR. | ||
| Charles Ledoux [2] | 1919-07-31 | London, ENG, GBR |
| Defeats Jem Driscoll; also defeats Walter Ross, who has defeated Tommy Noble, on 19-12-13 in Paris, FRA; officially recognized by IBU at its convention on 20-02-05 (The Sandusky Star-Journal, Sandusky, OH, USA, 20-02-06); still champion as of 22-06-18. | ||
| Tommy Harrison | 1921-10-24 | Hanley, ENG, GBR |
| Charles Ledoux [3] | 1922-04-24 | Liverpool, Merseyside, ENG, GBR |
| Harry Lake | 1923-07-30 | London, ENG, GBR |
| Also holds British Empire and British titles; officially recognized by IBU on 23-11-18 (The Ottawa Citizen, Ottawa, ON, CAN, 23-11-19). | ||
| Johnny Brown | 1923-11-26 | London, ENG, GBR |
| Wins European, British Empire, and British titles; vacant in 25. | ||
| Henri Scillie | 1925-05-11 | Brussels, BEL |
| Defeats Andre Routis; vacant in 28(?) to move up to the bantamweight class. | ||
| Domenico Bernasconi | 1929-03-10 | Milan, ITA |
| Defeats Nicolas Petit-Biquet. | ||
| Carlos Flix | 1929-09-26 | Barcelona, ESP |
| Lucian Popescu | 1931-09-19 | Bucharest, ROM |
| Domenico Bernasconi [2] | 1932-03-19 | Milan, ITA |
| Vacates in 32. | ||
| Nicolas Petit-Biquet | 1932-12-07 | Brussels, BEL |
| Defeats Carlos Flix. | ||
| Maurice Dubois | 1935-05-11 | Geneva, SUI |
| Joseph Decico | 1936-02-19 | Lyon, FRA |
| Aurel Toma | 1936-07-26 | Bucharest, ROM |
| Vacant in 36. | ||
| Nicolas Petit-Biquet [2] | 1937-02-03 | Brussels, BEL |
| Defeats Maurice Huguenin; vacant in 38 (retires?). | ||
| Aurel Toma [2] | 1938-06-04 | Bucharest, ROM |
| Defeats Gino Cattaneo. | ||
| Ernst Weiss | 1939-08-11 | Berlin, GER |
| Gino Cattaneo | 1939-11-25 | Berlin, GER |
| Gino Bondavalli | 1941-09-27 | Reggio Emilia, ITA |
| Vacant in 46(?). | ||
| Jackie Paterson | 1946-03-19 | London, ENG, GBR |
| Defeats Theo Medina. | ||
| Theo Medina | 1946-10-30 | Glasgow, SCT, GBR |
| Peter Kane | 1947-09-19 | Manchester, ENG, GBR |
| Guido Ferracin | 1948-02-20 | Manchester, ENG, GBR |
| Still champion as of 48-07-16. | ||
| Luis Romero | 1949-08-10 | Barcelona, ESP |
| Peter Keenan | 1951-09-05 | Glasgow, SCT, GBR |
| Jean Sneyers | 1952-05-21 | Glasgow, SCT, GBR |
| Vacates in 56. | ||
| Peter Keenan [2] | 1953-06-17 | Glasgow, SCT, GBR |
| Defeats Maurice Sandeyron. | ||
| John Kelly | 1953-10-03 | Belfast, NIR, GBR |
| Robert Cohen | 1954-02-27 | Belfast, IRE |
| Vacates on 54-03-17. | ||
| Mario D'Agata | 1955-10-29 | Milan, ITA |
| Defeats Andre Valignat. | ||
| Piero Rollo | 1958-10-12 | Cagliari, ITA |
| Freddie Gilroy | 1959-11-03 | London, ENG, GBR |
| May be vacant in 61. | ||
| Jean Pierre Cossemyns | 1961-05-27 | Brussels, BEL |
| Defeats Freddie Gilroy possibly for the vacant title. | ||
| Piero Rollo | 1962-04-13 | Brussels, BEL |
| Alphonse Halimi | 1962-06-26 | Tel Aviv, ISR |
| Piero Rollo [2] | 1962-10-28 | Cagliari, ITA |
| Mimoun Ben Ali | 1963-07-19 | Madrid, ESP |
| Risto Luukkonen | 1963-12-09 | Helsinki, FIN |
| Vacant in 65(?). | ||
| Mimoun Ben Ali [2] | 1965-02-04 | Barcelona, ESP |
| Defeats Pierre Vetroff. | ||
| Tommaso Galli | 1965-08-19 | San Remo, ITA |
| Mimoun Ben Ali [3] | 1966-06-17 | Barcelona, ESP |
| Salvatore Burruni | 1968-01-10 | Naples, ITA |
| Vacates in 69 (sometime after 69-04-09). | ||
| Franco Zurlo | 1969-12-17 | Taurianova, ITA |
| Defeats Mimoun Ben Ali. | ||
| Alan Rudkin | 1971-02-16 | London, ENG, GBR |
| Agustin Senin | 1971-08-10 | Bilbao, ESP |
| Vacant in 73(?). | ||
| Johnny Clark | 1973-04-17 | London, ENG, GBR |
| Defeats Franco Zurlo; vacant in 74. | ||
| Bob Allotey | 1974-10-04 | Madrid, ESP |
| Defeats Guy Caudron. | ||
| Daniel Trioulaire | 1975-02-09 | Rouen, FRA |
| Salvatore Fabrizio | 1976-08-14 | Ospedaletti, ITA |
| Franco Zurlo | 1977-02-23 | Fasano, ITA |
| Juan Francisco Rodríguez | 1978-09-16 | Vigo, ESP |
| Johnny Owen | 1980-02-28 | Ebbw Vale, WEL, GBR |
| Vacant in 80. | ||
| Valerio Nati | 1980-12-03 | Forli, ITA |
| Defeats Juan Francisco Rodriguez. | ||
| Giuseppe Fossati | 1982-04-28 | Lignano Sabbiadoro, ITA |
| Walter Giorgetti | 1983-06-09 | Sciacca, ITA |
| Vacant in 84. | ||
| Ciro De Leva | 1984-11-14 | Salerno, ITA |
| Defeats John Feeney; vacant in 86. | ||
| Antoine Montero | 1986-10-27 | Paris, FRA |
| Defeats Ray Gilbody. | ||
| Louis Gomis | 1987-05-22 | La Seyne-sur-Mer, FRA |
| Vacant in 87. | ||
| Fabrice Benichou | 1988-01-30 | Calais, FRA |
| Defeats Thierry Jacob. | ||
| Vincenzo Belcastro | 1988-04-13 | Busalla, ITA |
| Vacant in 90. | ||
| Thierry Jacob | 1990-09-30 | Calais, FRA |
| Defeats Duke McKenzie; vacant in 92(?). | ||
| Johnny Bredahl | 1992-03-14 | Copenhagen, DEN |
| Defeats Donnie Hood; vacant in 92. | ||
| Vincenzo Belcastro [2] | 1993-01-27 | Orzinuovi, ITA |
| Defeats Antonio Picardi. | ||
| Naseem Hamed | 1994-05-11 | Sheffield, ENG, GBR |
| Still champion as of 94-08-17; vacant in 95(?). | ||
| Johnny Armour | 1995-04-19 | London, ENG, GBR |
| Defeats Antonio Picardi; vacant in 96. | ||
| Johnny Bredahl | 1996-05-31 | Copenhagen, DEN |
| Defeats Alexander Yagupov; vacant in 98. | ||
| Paul Lloyd | 1998-12-12 | Chester, ENG, GBR |
| Defeats Luigi Mancini; vacant in 99. | ||
| Johnny Bredahl [2] | 1999-05-04 | Copenhagen, DEN |
| Defeats Kamel Guerfi; vacant in 2000(?). | ||
| Luigi Castiglione | 2000-10-06 | Naestved, DEN |
| Defeats Jesper D. Jensen. | ||
| Fabien Guillerme | 2001-03-12 | Paris, FRA |
| Alexander Yagupov | 2001-06-12 | Nice, FRA |
| Spend Abazi | 2001-09-21 | Vejle, DEN |
| Vacant in 02. | ||
| Noel Wilders | 2003-01-28 | Nice, FRA |
| Defeats Fabien Guillerme. | ||
| David Guerault | 2003-06-10 | Sheffield, ENG, GBR |
| Frederic Patrac | 2004-06-11 | Nancy, FRA |
| Simone Maludrottu | 2004-09-18 | Olbia, ITA |
| Vacant in 07. | ||
| Carmelo Ballone | 2007-12-21 | Hainaut, BEL |
| Defeats Eugen Sorin Tanasie. | ||
| Ian Napa | 2008-10-17 | London, ENG, GBR |
| Malik Bouziane | 2009-03-20 | London, ENG, GBR |
| Vacant in 10. | ||
| Jamie McDonnell | 2010-03-20 | Le Cannet, FRA |
| Defeats Jerome Arnould; vacant in 12. | ||
| Lee Haskins | 2012-07-07 | Clevedon, ENG, GBR |
| Defeats Stuart Hall. | ||
| Stephane Jamoye | 2012-12-14 | Herstal, BEL |
| Karim Guerfi | 2013-09-28 | Herstal, BEL |
| Zhanat Zhakiyanov | 2014-04-26 | Sheffield, ENG, GBR |
| Vacant in 15(?) | ||
| Lee Haskins | 2015-02-21 | Monte Carlo, MON |
| Defeats Omar Lamiri; vacant in 15. | ||
| Ryan Farrag | 2015-10-30 | Herstal, BEL |
| Defeats Stephane Jamoye. | ||
| Karim Guerfi [2] | 2016-06-04 | Liverpool, Merseyside, ENG, GBR |
| Vacant in 18. | ||
| Georges Ory | 2018-10-26 | Vesoul, FRA |
| Defeats Josh Wale. | ||
| Karim Guerfi [3] | 2019-11-23 | Saint-Nazaire, FRA |
| Lee McGregor | 2021-03-19 | Bolton, Lancashire, ENG, GBR |
| Also holds Commonwealth, British, and IBF Youth titles; vacant in 22-10. | ||
| Alessio Lorusso | 2022-10-14 | Monza, Lombardia, ITA |
| Defeats Sebastian Perez. | ||
| Thomas Essomba | 2023-05-20 | Monza, Lombardia, ITA |
| Charlie Edwards | 2024-09-27 | London, ENG, GBR |
| Loses his bids for Commonwealth, British, and the vacant WBC Silver titles on 25-03-15. | ||
| Cristian Zara | 2025-05-09 | Foiano di Val Fortore, CAM, ITA |
| Defeats Vincenzo Picardi. | ||