This is a list of WBO world champions, showing every world champion certified by the World Boxing Organization (WBO). The WBO is one of the four major governing bodies in professional boxing, and has awarded world championships in 17 different weight classes since 1989.
Boxers who won the title but were stripped due to the title bout being overturned to a no contest are not listed.
Current champion
Most consecutive title defenses
r – Champion relinquished title. s – Champion stripped of title.
^"現役世界王者の山田が引退=WBO女子ミニフライ級". jiji.com. Retrieved 4 March 2023.
^"池原シーサーが王者のまま引退、箕輪OPBF王座獲得". boxingnews.jp/. Retrieved 4 March 2023.
^ a b"Ayaka Miyao and Etsuko Tada to clash for WBO crown!". asianboxing.info. Retrieved 4 March 2023.
^Iskenderov, Parviz (30 March 2024). "Seniesa Estrada bests Yokasta Valle to land undisputed title". FIGHTMAG.
^"'타이틀 박탈' 설움 딛고...복싱 이은혜 선수 '재도전'". ytn.co.kr. 2 October 2016. Retrieved 4 March 2023.
^"Former WBO Champ Fil-Aussie Louisa Hawton Is A World Beater". philboxing.com. Retrieved 4 March 2023.
^"WBO 여자 라이트플라이급 챔피언 홍서연 타이틀 반납!!". naver.com. Retrieved 4 March 2023.
^"Five-time female champ Fujioka renounces WBO 108lb belt". fightnews.com. 18 December 2017. Retrieved 4 March 2023.
^Morilla, Diego (11 March 2023). "Bermudez squeezes past Enriquez to reclaim junior flyweight titles in Argentina's Luna Park". The Ring. Retrieved 22 May 2023.
^"Adams becomes WBO world flyweight champion". espn.co.uk. 30 July 2019. Retrieved 4 March 2023.
^"Nicola Adams retires: 'I tore the pupil in my eye in last fight'". BBC Sport. Retrieved 4 March 2023.
^"Carolina Duer se quedó con el título mundial gallo OMB". lanacion.com.ar. 27 July 2013. Retrieved 4 March 2023.
^"WBO女子世界スーパーフライ級王者の小沢瑶生が引退「家族の人生を考え、ここで区切り」". sponichi.co.jp. Retrieved 4 March 2023.
^"Ellie Scotney Unifies, Wins Ring Title; Rhiannon Dixon Captures Vacant Crown". Boxing Scene. Retrieved 22 April 2024.
^Christ, Scott (30 October 2020). "Naoya Inoue vs Jason Moloney set, Ewa Brodnicka loses title on scale for Mikaela Mayer fight". badlefthook.com. Retrieved 4 March 2023.
^"Katie Taylor vacates second world title as Chantelle Cameron makes trilogy fight vow". Irish Mirror. Retrieved 22 April 2024.
^"Ellie Scotney claims second super-bantamweight belt, Rhiannon Dixon beats Karen Elizabeth Carabajal". BBC Sport. Retrieved 22 April 2024.
^"GEOVANA PERES ANNOUNCES HER RETIREMENT". New Zealand fighter. Retrieved 26 January 2021.