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| International Boxing Union | ( | 1913 | - | 1940s | ) |
| European Boxing Union | ( | 1946 | - | ) |
* Bolded letters in the competitor's name, if any, indicate the surname/family name.
| Freddie Welsh (Frederick H. Thomas) | 1909-08-23 | Mountain Ash, WEL, GBR |
| Defeats Henri Piet. | ||
| Matt Wells | 1911-02-27 | London, ENG, GBR |
| Freddie Welsh [2] | 1912-11-11 | London, ENG, GBR |
| Vacant probably after Welsh wins the world title on 14-07-07. | ||
| Bob Marriott | 1919-04-10 | London, ENG, GBR |
| Defeats Raymond Vittet; vacant as of 20-02-05 as declared by IBU at its convention (The Sandusky Star-Journal, Sandusky, OH, USA, 20-02-06). | ||
| Georges Papin | 1920-05-17 | Paris, FRA |
| Defeats Bob Marriott. | ||
| Ernie Rice | 1921-05-09 | London, ENG, GBR |
| Seaman Nobby Hall | 1922-09-18 | Liverpool, Merseyside, ENG, GBR |
| Vacant in 23. | ||
| Harry Mason | 1923-05-17 | Kensington, ENG, GBR |
| Defeats Ernie Rice; officially recognized by IBU on 23-11-18 (The Ottawa Citizen, Ottawa, ON, CAN, 23-11-19). | ||
| Fred Bretonnel | 1924-02-27 | |
| Awarded when Mason vacates the title. | ||
| Lucien Vinez | 1924-10-07 | Paris, FRA |
| Luis Rayo | 1927-08-03 | Barcelona, ESP |
| Vacant in 28(?). | ||
| Aime Raphael | 1928-12-22 | Paris, FRA |
| Defeats Paul Czirson. | ||
| François Sybille | 1929-04-14 | Marseille, FRA |
| Alf Howard | 1930-01-16 | Liverpool, Merseyside, ENG, GBR |
| François Sybille [2] | 1930-06-18 | Brussels, BEL |
| Bep van Klaveren | 1931-07-19 | Rotterdam, NED |
| Cleto Locatelli | 1932-07-17 | Rotterdam, NED |
| François Sybille [3] | 1932-12-07 | Brussels, BEL |
| Cleto Locatelli [2] | 1933-10-22 | Rome, ITA |
| Vacant in 34. | ||
| François Sybille [4] | 1934-02-10 | Brussels, BEL |
| Defeats Gustave Humery. | ||
| Carlo Orlandi | 1934-03-17 | Milan, ITA |
| Vacant in 35. | ||
| Enrico Venturi | 1935-10-12 | Rome, ITA |
| Defeats Henri Ferret; vacates in 36. | ||
| Vittorio Tamagnini | 1936-10-10 | Rome, ITA |
| Defeats Raymond Renard. | ||
| Maurice Arnault | 1937-04-22 | Paris, FRA |
| Gustave Humery | 1937-05-27 | Paris, FRA |
| Vacant in 38(?). | ||
| Aldo Spoldi | 1938-09-02 | Copenhagen, DEN |
| Defeats Carl Andersen; vacates in 40. | ||
| Karl Blaho | 1940-10-26 | Vienna, AUT |
| Defeats Otello Abbruciati. | ||
| Bruno Bisterzo | 1941-05-31 | Munich, BY, GER |
| Ascenzo Botta | 1942-05-14 | Rome, ITA |
| Roberto Proietti | 1942-09-20 | Rome, ITA |
| Bruno Bisterzo | 1943-05-08 | Lucca, ITA |
| Roberto Proietti | 1946-05-28 | Rome, ITA |
| Vacates in 46. | ||
| Emile Di Cristo | 1946-12-04 | Brussels, BEL |
| Defeats Joseph Preys. | ||
| Kid Dussart | 1947-03-29 | Brussels, BEL |
| Roberto Proietti | 1947-05-21 | Brussels, BEL |
| Billy Thompson | 1948-02-17 | London, ENG, GBR |
| Kid Dussart | 1949-07-05 | London, ENG, GBR |
| Roberto Proietti | 1949-12-17 | Brussels, BEL |
| Vacates in 50 upon retirement. | ||
| Pierre Montane | 1951-02-23 | Manchester, ENG, GBR |
| Defeats Billy Thompson. | ||
| Elis Ask | 1951-08-17 | Helsinki, FIN |
| Jorgen Johansen | 1952-01-04 | Copenhagen, DEN |
| Duilio Loi | 1954-02-06 | Milan, ITA |
| Vacates in 59 to move up to the light welterweight class. | ||
| Mario Vecchiatto | 1959-10-24 | Milan, ITA |
| Defeats Lahouari Godih. | ||
| Dave Charnley | 1960-03-29 | London, ENG, GBR |
| Vacates in 63. | ||
| Conny Rudhof | 1963-09-29 | Rüsselsheim, GER |
| Defeats Giordano Campari; vacates in 64 to move up to the light welterweight class. | ||
| Willy Quatuor | 1964-05-08 | Berlin, GER |
| Defeats Michele Gullotti; vacant in 65(?). | ||
| Franco Brondi | 1965-03-13 | Cannes, FRA |
| Defeats Leon Zadourian. | ||
| Maurice Tavant | 1965-10-09 | Rhône, FRA |
| Borge Krogh | 1966-11-03 | Copenhagen, DEN |
| Pedro Carrasco | 1967-06-30 | Madrid, ESP |
| Vacates in 69. | ||
| Miguel Velazquez | 1970-01-29 | Madrid, ESP |
| Defeats Ken Buchanan. | ||
| Antonio Puddu | 1971-07-31 | Barcelona, ESP |
| Ken Buchanan | 1974-05-01 | Cagliari, ITA |
| Vacates in 76 upon (temporary) retirement. | ||
| Fernand Roelands | 1976-02-06 | Brugge, BEL |
| Defeats Andre Holyk. | ||
| Perico Fernandez | 1976-07-09 | Zaragoza, ESP |
| Vacates in 77. | ||
| Jim Watt | 1977-08-05 | Glasgow, SCT, GBR |
| Vacates in 79 after winning WBC world title on 79-04-17. | ||
| Charlie Nash | 1979-06-27 | Derry, NIR, GBR |
| Defeats Andre Holyk; vacant in 80. | ||
| Francisco Leon | 1980-06-01 | Tarrasa, ESP |
| Defeats Giancarlo Usai. | ||
| Charlie Nash [2] | 1980-12-14 | Dublin, IRE |
| Giuseppe Gibilisco | 1981-05-10 | Dublin, IRE |
| Ray Cattouse | 1982-02-24 | Campobasso, ITA |
| Vacant in 82. | ||
| Giuseppe Gibilisco [2] | 1982-11-10 | Sassari, ITA |
| Defeats José Antonio Garcia. | ||
| Lucio Cusma | 1983-03-17 | Capo d'Orlando, ITA |
| Rene Weller | 1983-06-29 | Brolo, ITA |
| Vacant in 83. | ||
| Lucio Cusma [2] | 1983-09-30 | Modena, ITA |
| Defeats Aldo Di Benedetto. | ||
| Rene Weller [2] | 1984-03-09 | Frankfurt, HE, GER |
| Gert Bo Jacobsen | 1986-01-10 | Randers, DEN |
| Vacant in 88(?).s | ||
| Rene Weller [3] | 1988-03-05 | Karlsruhe, GER |
| Defeats José Maillot; vacant in 88. | ||
| Policarpo Diaz | 1988-11-30 | Chiavari, ITA |
| Defeats Luca De Lorenzi; still champion as of 90-09-15; vacant in 91(?). | ||
| Antonio Renzo | 1991-04-27 | Rossano, ITA |
| Defeats Steve Boyle. | ||
| Jean Baptiste Mendy | 1992-03-27 | Creil, FRA |
| Vacant in 95. | ||
| Angel Mona | 1995-07-18 | Savoie, FRA |
| Defeats Andriy Syniepupov. | ||
| Carlos Fernandes | 1997-02-15 | Thiais, FRA |
| Oscar Garcia Cano | 1997-03-29 | Grande-Synthe, FRA |
| Billy Schwer | 1997-10-25 | Zaragoza, ESP |
| Vacates in 99. | ||
| Oscar Garcia Cano [2] | 1999-11-15 | Paris, FRA |
| Defeats Djamel Lifa. | ||
| Julien Lorcy | 2000-01-31 | Paris, FRA |
| Vacant in 01(?). | ||
| Stefano Zoff | 2001-05-26 | Trieste, ITA |
| Vacant in 02(?). | ||
| Jason Cook | 2002-08-02 | San Mango d'Aquino, ITA |
| Defeats Sandro Casamonica; vacant in 03. | ||
| Stefano Zoff [2] | 2003-06-07 | Trieste, ITA |
| Defeats David Burke. | ||
| Juan Carlos Diaz Melero | 2005-11-04 | Leganes, ESP |
| Yuri Ramanau | 2006-11-11 | Ciudad Real, ESP |
| Vacant in 08. | ||
| Jonathan Thaxton | 2008-10-04 | Norwich, ENG, GBR |
| Defeats Juan Carlos Diaz Melero. | ||
| Anthony Mezaache | 2009-02-28 | Norwich, ENG, GBR |
| Vacant in 10(?). | ||
| John Murray | 2010-05-07 | Widnes, ENG, GBR |
| Defeats Gary Buckland; vacant in 11. | ||
| Gavin Rees | 2011-06-04 | Cardiff, WEL, GBR |
| Vacant in 13(?). | ||
| Emiliano Marsili | 2013-03-09 | Civitavecchia, ITA |
| Defeats Luca Giacon; vacant in 15. | ||
| Edis Tatli | 2015-04-25 | Helsinki, FIN |
| Defeats Yvan Mendy. | ||
| Francesco Patera | 2017-05-06 | Turku, FIN |
| Edis Tatli [2] | 2017-12-12 | Helsinki, FIN |
| Vacant in 18. | ||
| Francesco Patera | 2018-10-13 | Newcastle, ENG, GBR |
| Defeats Lewis Ritson; vacates in 20-01 to focus on challenging for the interim WBA World Title. | ||
| Yvan Mendy | 2022-04-30 | Pont-Sainte-Maxence, FRA |
| Defeats Gianluca Ceglia. | ||
| Denys Berinchyk | 2022-12-03 | London, ENG, GBR |
| Also holds WBO International Title; vacant in 23. | ||
| Gavin Gwynne | 2023-12-01 | London, ENG, GBR |
| Defeats Emiliano Marsili; loses in a non-title match on 24-03-08. | ||
| Sam Noakes | 2024-04-20 | London, ENG, GBR |
| Defeats Yvan Mendy; also holds WBO International, WBC International Silver, Commonwealth, and British titles. | ||