The flyweight division was the last of boxing's eight traditional weight classes to be established. Before 1909, anyone below featherweight was considered a bantamweight, regardless of how small the boxer. In 1911, the organization that eventually became the British Boxing Board of Control held a match that crowned Sid Smith as the first flyweight champion of the world. Jimmy Wilde, who reigned from 1914 to 1923, was the first fighter recognized both in Britain and the United States as a flyweight champion.
Other notable flyweights include Pancho Villa, Walter McGowan, Pascual Pérez, Pone Kingpetch, Fighting Harada, Masao Ohba, Chartchai Chionoi, Efren Torres, Erbito Salavarria, Miguel Canto, Dave McAuley, Charlie Magri, Gabriel Bernal, Santos Laciar, Sot Chitalada, Yong-Kang Kim, Yuri Arbachakov, Danny Romero, Mark "Too Sharp" Johnson, Manny Pacquiao, Jorge Arce, Vic Darchinyan, Nonito Donaire and Pongsaklek Wonjongkam.
|Sanctioning Body||Reign Began||Champion||Record||Defenses|
|WBA (Super)||April 6, 2013||Juan Francisco Estrada||32-2 (23 KO)||4|
|WBA||April 22, 2015||Kazuto Ioka||17-1 (10 KO)||0|
|WBA (Interim)||July 29, 2015||Stamp Kiatniwat||14-0 (6 KO)||0|
|WBC||September 5, 2014||Román González||43-0 (37 KO)||2|
|IBF||January 22, 2014||Amnat Ruenroeng||16-0 (5 KO)||4|
|WBO||April 6, 2013||Juan Francisco Estrada||32-2 (23 KO)||4|
- 1904: George Finnegan (USA)
- 1920: Frankie Genaro (USA)
- 1924: Fidel La Barba (USA)
- 1928: Antal Kocsis (HUN)
- 1932: István Énekes (HUN)
- 1936: Willi Kaiser (GER)
- 1948: Pascual Pérez (ARG)
- 1952: Nathan Brooks (USA)
- 1956: Terry Spinks (GBR)
- 1960: Gyula Török (HUN)
- 1964: Fernando Atzori (ITA)
- 1968: Ricardo Delgado (MEX)
- 1972: Georgi Kostadinov (BUL)
- 1976: Leo Randolph (USA)
- 1980: Petar Lessov (BUL)
- 1984: Steve McCrory (USA)
- 1988: Kim Kwang-Sun (KOR)
- 1992: Choi Chol-Su (PRK)
- 1996: Maikro Romero (CUB)
- 2000: Wijan Ponlid (THA)
- 2004: Yuriorkis Gamboa (CUB)
- 2008: Somjit Jongjohor (THA)
- 2012: Robeisy Ramirez (CUB)
Pan American Champions
- 1951: Alberto Barenghi (ARG)
- 1955: Hilario Correa (MEX)
- 1959: Miguel Angel Botta (ARG)
- 1963: Floreal García (URU)
- 1967: Francisco Rodríguez (VEN)
- 1971: Francisco Rodríguez (VEN)
- 1975: Ramón Duvalón (CUB)
- 1979: Alberto Mercado (PUR)
- 1983: Pedro Orlando Reyes (CUB)
- 1987: Adalberto Regalado (CUB)
- 1991: José Ramos (boxer) (CUB)
- 1995: Joan Guzmán (DOM)
- 1999: Omar Andrés Narváez (ARG)
- 2003: Yuriorkis Gamboa (CUB)
- 2007: McWilliams Arroyo (PUR)
- 2011: Robeisy Ramírez (CUB)
In kickboxing, a flyweight fighter generally weighs 53 kg (115 lb) or under. The International Kickboxing Federation (IKF) Flyweight division (professional and amateur) is 112.1 lbs. – 117 lbs. or 50.95 kg – 53.18 kg.
Mixed Martial Arts
The flyweight division in mixed martial arts – as defined the Nevada State Athletic Commission combat sports doctrine and by the Association of Boxing Commissions – groups together all competitors 125 lb (57 kg) and below.
- http://www.aiba.org/documents/site1/Articles%20&%20Rules/technical_and_competition_rules_20111025.pdf Technical & Competition Rules, Appendix K AIBA
- Mullan, Harry (1996). Boxing: The Definitive Illustrated Guide to World Boxing. London, England: Carlton Books. p. 186. ISBN 0-7858-0641-5.
- "Nevada Revised Statutes: CHAPTER 467 - UNARMED COMBAT". http://www.leg.state.nv.us. Retrieved 2007-02-20.
- "UNIFIED RULES OF MMA". ABCBoxing.com. Retrieved 2012-07-15.