List of ONE Championship champions#Flyweight

This is a list of ONE Championship champions in each weight division of each sport.{{cite web|url=http://onefc.com/about-one.html|title=About ONE - ONE Championship|website=ONE Championship}}

Current champions

class="wikitable" \|+ Men !Division !Champion !Since !Ref. !Defenses
colspan="5" align=center \|Mixed martial arts
align=left \| Heavyweight {{small\|{{convert\|265\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|SEN}} Oumar Kane \| align=center \|November 9, 2024 \| align=center \|{{cite web\|url=https://www.mmafighting.com/2024/11/9/24291958/one-169-results-reug-reug-claims-heavyweight-title-with-narrow-split-decision-win\|title=ONE 169 Results: Reug Reug claims heavyweight title with narrow split decision win\|website=MMA Fighting\|date=2024-11-09\|access-date=2024-11-09}} \| align=center \|0
align=left \|Light Heavyweight {{small\|{{convert\|225\|lb\|kg\|1\|abbr=on}}}} \|rowspan=2\|{{flagicon\|RUS}} Anatoly Malykhin \| align=center \|December 3, 2022 \| align=center \|{{cite web\|url=https://www.mmafighting.com/2022/12/3/23491003/one-on-prime-video-5-results-anatoliy-malykhin-starches-reinier-de-ridder-in-first-for-second-title\|title=ONE on Prime Video 5 results: Anatoliy Malykhin starches Reinier de Ridder in first for second title\|website=MMA Fighting\|author=Steven Marrocco\|date=2022-12-03\|access-date=2022-12-03}} \| align=center \|0
align=left \|Middleweight {{small\|{{convert\|205\|lb\|kg\|1\|abbr=on}}}} \| align=center \|March 1, 2024 \| align=center \|{{Cite web \|last=Dewar \|first=Val \|date=2024-03-01 \|title=ONE 166: Anatoly Malykhin Becomes First Triple-Champ in MMA History \|url=https://cagesidepress.com/2024/03/01/one-166-anatoly-malykhin-becomes-first-triple-champ-in-mma-history/ \|access-date=2024-03-01 \|website=Cageside Press \|language=en-US}} \| align=center \|0
align=left \|Welterweight {{small\|{{convert\|185\|lb\|kg\|1\|abbr=on}}}} \| rowspan=2 \|{{flagicon\|USA}} Christian Lee \| align=center \| November 19, 2022 \| align=center \|{{Cite web\|url=https://cagesidepress.com/2022/11/19/one-prime-video-4-kiamrian-abbasov-vs-christian-lee/\|title=ONE on Prime Video 4: Christian Lee Survives Early Near-Finish, Rallies Back to Claim Second Belt\|publisher=Cageside Press\|author=Jay Anderson\|date=2022-11-19\|access-date=2022-11-19}} \| align=center \|0
align=left \|Lightweight {{small\|{{convert\|170\|lb\|kg\|1\|abbr=on}}}} \| align=center \|August 26, 2022 \| align=center \|{{Cite web\|url=https://cagesidepress.com/2022/08/26/christian-lee-recaptures-one-championship-lightweight-title-with-devastating-knockout/\|title=Christian Lee Recaptures ONE Championship Lightweight Title with Devastating Knockout\|publisher=Cageside Press\|author=Val Dewar\|date=2022-08-26\|access-date=2022-10-18}} \| align=center \|0
align=left rowspan=1 \|Featherweight {{small\|{{convert\|155\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|CHN}} Tang Kai \| align=center \|August 26, 2022 \| align=center \|{{Cite web\|url=https://www.onefc.com/news/surgical-tang-kai-makes-history-after-masterful-performance-against-thanh-le/\|title=Surgical Tang Kai Makes History After Masterful Performance Against Thanh Le\|publisher=ONE Championship – The Home of Martial Arts\|author=Christian Jacinto\|date=2022-08-27\|access-date=2022-10-18}} \| align=center \|1
align=left \|Bantamweight {{small\|{{convert\|145\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|BRA}} Fabrício Andrade \| align=center \| February 25, 2023 \| align=center \| {{Cite web\|url=https://cagesidepress.com/2023/02/25/one-fight-night-7-fabricio-andrade-outlasts-john-lineker/\|title=ONE Fight Night 7: Fabricio Andrade Claims Gold After Lineker Fails to Answer Bell for Round 5\|website=Cageside Press\|author=Val Dewar\|date=2023-02-25\|access-date=2023-02-25}} \| align=center \| 1
align=left \|Flyweight {{small\|{{convert\|135\|lb\|kg\|1\|abbr=on}}}} \| {{flagicon\|JPN}} Yuya Wakamatsu \| align=center \|March 23, 2025 \| align=center \| \| align=center \|0
align="left" \|Strawweight {{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|PHI}} Joshua Pacio \| align=center \|March 1, 2024 \| align=center \|{{cite web \|title=ONE Championship 164: Brooks out-strikes Pacio to take strawweight title \|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3201950/one-championship-164-joshua-pacio-vs-jarred-brooks-live-results-updates \|website=South China Morning Post \|author=Tom Taylor and Nicolas Atkin \|access-date=2022-12-03 \|date=2022-12-03}} \| align=center \|1
colspan="5" align="center" \|Kickboxing
align=left \|Light Heavyweight {{small\|{{convert\|225\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|UKR}} Roman Kryklia \| align=center \|November 16, 2019 \| align=center \|{{cite web\|url=https://www.onefc.com/news/roman-kryklia-makes-world-title-history-with-spectacular-ko/\|title=Roman Kryklia Makes World Title History With Spectacular KO\|publisher=ONE Championship – The Home of Martial Arts\|date=2019-11-16\|access-date=2022-10-18}} \| align=center \|2
align=left \|Lightweight {{small\|{{convert\|170\|lb\|kg\|1\|abbr=on}}}} \|Vacant \| align=center \| - \| align=center \| - \| align=center \| -
align=left \|Featherweight {{small\|{{convert\|155\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|THA}} Superbon Singha Mawynn \| align=center\| January 6, 2025 \| align=center\| \| align=center\| 0
align=left \|Bantamweight {{small\|{{convert\|145\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|ENG}} Jonathan Haggerty \| align=center \| November 4, 2023 \| align=center \| {{cite web \|last1=Kirven \|first1=J.L. \|title=Jonathan Haggerty Becomes Two-Sport King at ONE Fight Night 16 \|url=https://www.sherdog.com/news/news/Jonathan-Haggerty-Becomes-TwoSport-King-at-ONE-Fight-Night-16-191593 \|website=Sherdog \|access-date=4 November 2023 \|language=en}} \| align=center \| 1
align=left \|Flyweight {{small\|{{convert\|135\|lb\|kg\|1\|abbr=on}}}} \| {{flagicon\|THA}} Superlek Kiatmuukao \| align=center \| January 14, 2023 \| align=center \| {{Cite web\|url=https://cagesidepress.com/2023/01/13/one-on-prime-video-6-superlek-kiatmoo9-wins-vacant-belt-over-daniel-puertas/\|title=ONE Fight Night 6: Superlek Kiatmoo9 wins vacant belt in new sport over Daniel Puertas\|website=Cageside Press\|author=Val Dewar\|date=2023-01-13\|access-date=2023-01-14}} \| align=center \|2
align=left \|Strawweight {{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}} \| {{flagicon\|THA}} Prajanchai P.K.Saenchai \| align=center \| June 28, 2024 \| align=center \|– \| align=center \|0
colspan="5" align=left \|Muay Thai
align=left \| Heavyweight {{small\|Above {{convert\|225\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|UKR}} Roman Kryklia \| align=center \|December 8, 2023 \| align=center \|{{cite web\|url=https://www.onefc.com/news/roman-kryklia-becomes-double-champ-with-knockout-of-alex-roberts-in-heavyweight-muay-thai-world-title-fight/\|title=Roman Kryklia Becomes Double-Champ With Knockout Of Alex Roberts In Heavyweight Muay Thai World Title Fight\|publisher=ONE Championship – The Home of Martial Arts\|date=2023-12-08\|access-date=2023-12-08}} \| align=center \|1
align=left \|Lightweight {{small\|{{convert\|170\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|SUR}} Regian Eersel \| align=center \|October 22, 2022 \| align=center \|{{Cite web\|url=https://www.onefc.com/news/regian-eersel-edges-out-sinsamut-klinmee-to-capture-inaugural-one-lightweight-muay-thai-world-title/\|title=Regian Eersel Edges Out Sinsamut Klinmee To Capture Inaugural ONE Lightweight Muay Thai World Title\|publisher=ONE Championship – The Home of Martial Arts\|author=John Wolcott\|date=2022-08-22\|access-date=2022-10-22}} \| align=center \|2
align=left \|Featherweight {{small\|{{convert\|155\|lb\|kg\|1\|abbr=on}}}} \|{{nowrap\|{{flagicon\|THA}} Tawanchai P.K.Saenchai}} \| align=center \|September 29, 2022 \| align=center \|{{cite web \|title=ONE Championship 161 results: Tawanchai wins title in Muay Thai thriller, Tiffany Teo shines at atomweight \|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3194289/one-championship-161-results-petchmorakot-and \|publisher=South China Morning Post \|author=Tom Taylor and Nicolas Atkin \|access-date=2022-09-30 \|date=2022-10-18}} \| align=center \|4
align=left rowspan=2 \|Bantamweight {{small\|{{convert\|145\|lb\|kg\|1\|abbr=on}}}} \|Vacant \| align=center \| - \| align=center
align=center
{{flagicon\|THA}} Nabil Anane (interim) \| align=center \|January 24, 2025 \| \| align=center \|0
align=left \|Flyweight {{small\|{{convert\|135\|lb\|kg\|1\|abbr=on}}}} \|Vacant \| align=center \| - \| align=center \| \| align=center \| -
align=left \|Strawweight {{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|THA}} Prajanchai P.K.Saenchai \| align=center \|December 22, 2023 \| align=center \| \| align=center \| 1
colspan="5" align=left \|Submission grappling
align=left \|Welterweight {{small\|{{convert\|185\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|USA}} Tye Ruotolo \| align=center \|November 4, 2023 \| align=center \|{{cite web \|title=Tye Ruotolo Wins Title And $50,000 Bonus At ONE Fight Night 16 \|url=https://jitsmagazine.com/tye-ruotolo-wins-title-and-50000-bonus-at-one-fight-night-16/ \|website=Jitsmagazine \|date=November 4, 2023 \|access-date=November 4, 2023}} \| align=center \|1
align=left \|Lightweight {{small\|{{convert\|170\|lb\|kg\|1\|abbr=on}}}} \|{{flagicon\|USA}} Kade Ruotolo \| align=center \|October 22, 2022 \| align=center \|{{Cite web\|url=https://www.onefc.com/news/ruotolo-heel-hooks-kurzhev-to-capture-inaugural-one-lightweight-submission-grappling-world-title/\|title=Ruotolo Heel Hooks Kurzhev To Capture Inaugural ONE Lightweight Submission Grappling World Title\|publisher=ONE Championship – The Home of Martial Arts\|author=Ben Coate\|date=2022-08-26\|access-date=2022-10-18}} \| align=center \|3
align=left \|Flyweight {{small\|{{convert\|135\|lb\|kg\|1\|abbr=on}}}} \| {{flagicon

class="wikitable"

|+ Men

!Division

!Champion

!Since

!Ref.

!Defenses

colspan="5" align=center |Mixed martial arts

align=left | Heavyweight
{{small|{{convert|265|lb|kg|1|abbr=on}}}}

|{{flagicon|SEN}} Oumar Kane

| align=center |November 9, 2024

| align=center |{{cite web|url=https://www.mmafighting.com/2024/11/9/24291958/one-169-results-reug-reug-claims-heavyweight-title-with-narrow-split-decision-win|title=ONE 169 Results: Reug Reug claims heavyweight title with narrow split decision win|website=MMA Fighting|date=2024-11-09|access-date=2024-11-09}}

| align=center |0

align=left |Light Heavyweight
{{small|{{convert|225|lb|kg|1|abbr=on}}}}

|rowspan=2|{{flagicon|RUS}} Anatoly Malykhin

| align=center |December 3, 2022

| align=center |{{cite web|url=https://www.mmafighting.com/2022/12/3/23491003/one-on-prime-video-5-results-anatoliy-malykhin-starches-reinier-de-ridder-in-first-for-second-title|title=ONE on Prime Video 5 results: Anatoliy Malykhin starches Reinier de Ridder in first for second title|website=MMA Fighting|author=Steven Marrocco|date=2022-12-03|access-date=2022-12-03}}

| align=center |0

align=left |Middleweight
{{small|{{convert|205|lb|kg|1|abbr=on}}}}

| align=center |March 1, 2024

| align=center |{{Cite web |last=Dewar |first=Val |date=2024-03-01 |title=ONE 166: Anatoly Malykhin Becomes First Triple-Champ in MMA History |url=https://cagesidepress.com/2024/03/01/one-166-anatoly-malykhin-becomes-first-triple-champ-in-mma-history/ |access-date=2024-03-01 |website=Cageside Press |language=en-US}}

| align=center |0

align=left |Welterweight
{{small|{{convert|185|lb|kg|1|abbr=on}}}}

| rowspan=2 |{{flagicon|USA}} Christian Lee

| align=center | November 19, 2022

| align=center |{{Cite web|url=https://cagesidepress.com/2022/11/19/one-prime-video-4-kiamrian-abbasov-vs-christian-lee/|title=ONE on Prime Video 4: Christian Lee Survives Early Near-Finish, Rallies Back to Claim Second Belt|publisher=Cageside Press|author=Jay Anderson|date=2022-11-19|access-date=2022-11-19}}

| align=center |0

align=left |Lightweight
{{small|{{convert|170|lb|kg|1|abbr=on}}}}

| align=center |August 26, 2022

| align=center |{{Cite web|url=https://cagesidepress.com/2022/08/26/christian-lee-recaptures-one-championship-lightweight-title-with-devastating-knockout/|title=Christian Lee Recaptures ONE Championship Lightweight Title with Devastating Knockout|publisher=Cageside Press|author=Val Dewar|date=2022-08-26|access-date=2022-10-18}}

| align=center |0

align=left rowspan=1 |Featherweight
{{small|{{convert|155|lb|kg|1|abbr=on}}}}

|{{flagicon|CHN}} Tang Kai

| align=center |August 26, 2022

| align=center |{{Cite web|url=https://www.onefc.com/news/surgical-tang-kai-makes-history-after-masterful-performance-against-thanh-le/|title=Surgical Tang Kai Makes History After Masterful Performance Against Thanh Le|publisher=ONE Championship – The Home of Martial Arts|author=Christian Jacinto|date=2022-08-27|access-date=2022-10-18}}

| align=center |1

align=left |Bantamweight
{{small|{{convert|145|lb|kg|1|abbr=on}}}}

|{{flagicon|BRA}} Fabrício Andrade

| align=center | February 25, 2023

| align=center | {{Cite web|url=https://cagesidepress.com/2023/02/25/one-fight-night-7-fabricio-andrade-outlasts-john-lineker/|title=ONE Fight Night 7: Fabricio Andrade Claims Gold After Lineker Fails to Answer Bell for Round 5|website=Cageside Press|author=Val Dewar|date=2023-02-25|access-date=2023-02-25}}

| align=center | 1

align=left |Flyweight
{{small|{{convert|135|lb|kg|1|abbr=on}}}}

| {{flagicon|JPN}} Yuya Wakamatsu

| align=center |March 23, 2025

| align=center |

| align=center |0

align="left" |Strawweight
{{small|{{convert|125|lb|kg|1|abbr=on}}}}

|{{flagicon|PHI}} Joshua Pacio

| align=center |March 1, 2024

| align=center |{{cite web |title=ONE Championship 164: Brooks out-strikes Pacio to take strawweight title |url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3201950/one-championship-164-joshua-pacio-vs-jarred-brooks-live-results-updates |website=South China Morning Post |author=Tom Taylor and Nicolas Atkin |access-date=2022-12-03 |date=2022-12-03}}

| align=center |1

colspan="5" align="center" |Kickboxing

align=left |Light Heavyweight
{{small|{{convert|225|lb|kg|1|abbr=on}}}}

|{{flagicon|UKR}} Roman Kryklia

| align=center |November 16, 2019

| align=center |{{cite web|url=https://www.onefc.com/news/roman-kryklia-makes-world-title-history-with-spectacular-ko/|title=Roman Kryklia Makes World Title History With Spectacular KO|publisher=ONE Championship – The Home of Martial Arts|date=2019-11-16|access-date=2022-10-18}}

| align=center |2

align=left |Lightweight
{{small|{{convert|170|lb|kg|1|abbr=on}}}}

|Vacant

| align=center | -

align=left |Featherweight
{{small|{{convert|155|lb|kg|1|abbr=on}}}}

|{{flagicon|THA}} Superbon Singha Mawynn

| align=center| January 6, 2025

| align=center|

| align=center| 0

align=left |Bantamweight
{{small|{{convert|145|lb|kg|1|abbr=on}}}}

|{{flagicon|ENG}} Jonathan Haggerty

| align=center | November 4, 2023

| align=center | {{cite web |last1=Kirven |first1=J.L. |title=Jonathan Haggerty Becomes Two-Sport King at ONE Fight Night 16 |url=https://www.sherdog.com/news/news/Jonathan-Haggerty-Becomes-TwoSport-King-at-ONE-Fight-Night-16-191593 |website=Sherdog |access-date=4 November 2023 |language=en}}

| align=center | 1

align=left |Flyweight
{{small|{{convert|135|lb|kg|1|abbr=on}}}}

| {{flagicon|THA}} Superlek Kiatmuukao

| align=center | January 14, 2023

| align=center | {{Cite web|url=https://cagesidepress.com/2023/01/13/one-on-prime-video-6-superlek-kiatmoo9-wins-vacant-belt-over-daniel-puertas/|title=ONE Fight Night 6: Superlek Kiatmoo9 wins vacant belt in new sport over Daniel Puertas|website=Cageside Press|author=Val Dewar|date=2023-01-13|access-date=2023-01-14}}

| align=center |2

align=left |Strawweight
{{small|{{convert|125|lb|kg|1|abbr=on}}}}

| {{flagicon|THA}} Prajanchai P.K.Saenchai

| align=center | June 28, 2024

| align=center |–

| align=center |0

colspan="5" align=left |Muay Thai

align=left | Heavyweight
{{small|Above {{convert|225|lb|kg|1|abbr=on}}}}

|{{flagicon|UKR}} Roman Kryklia

| align=center |December 8, 2023

| align=center |{{cite web|url=https://www.onefc.com/news/roman-kryklia-becomes-double-champ-with-knockout-of-alex-roberts-in-heavyweight-muay-thai-world-title-fight/|title=Roman Kryklia Becomes Double-Champ With Knockout Of Alex Roberts In Heavyweight Muay Thai World Title Fight|publisher=ONE Championship – The Home of Martial Arts|date=2023-12-08|access-date=2023-12-08}}

| align=center |1

align=left |Lightweight
{{small|{{convert|170|lb|kg|1|abbr=on}}}}

|{{flagicon|SUR}} Regian Eersel

| align=center |October 22, 2022

| align=center |{{Cite web|url=https://www.onefc.com/news/regian-eersel-edges-out-sinsamut-klinmee-to-capture-inaugural-one-lightweight-muay-thai-world-title/|title=Regian Eersel Edges Out Sinsamut Klinmee To Capture Inaugural ONE Lightweight Muay Thai World Title|publisher=ONE Championship – The Home of Martial Arts|author=John Wolcott|date=2022-08-22|access-date=2022-10-22}}

| align=center |2

align=left |Featherweight
{{small|{{convert|155|lb|kg|1|abbr=on}}}}

|{{nowrap|{{flagicon|THA}} Tawanchai P.K.Saenchai}}

| align=center |September 29, 2022

| align=center |{{cite web |title=ONE Championship 161 results: Tawanchai wins title in Muay Thai thriller, Tiffany Teo shines at atomweight |url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3194289/one-championship-161-results-petchmorakot-and |publisher=South China Morning Post |author=Tom Taylor and Nicolas Atkin |access-date=2022-09-30 |date=2022-10-18}}

| align=center |4

align=left rowspan=2 |Bantamweight
{{small|{{convert|145|lb|kg|1|abbr=on}}}}

|Vacant

| align=center | -

| align=center

align=center

{{flagicon|THA}} Nabil Anane (interim)

| align=center |January 24, 2025

| align=center |0

align=left |Flyweight
{{small|{{convert|135|lb|kg|1|abbr=on}}}}

|Vacant

| align=center | -

| align=center |

| align=center | -

align=left |Strawweight
{{small|{{convert|125|lb|kg|1|abbr=on}}}}

|{{flagicon|THA}} Prajanchai P.K.Saenchai

| align=center |December 22, 2023

| align=center |

| align=center | 1

colspan="5" align=left |Submission grappling

align=left |Welterweight
{{small|{{convert|185|lb|kg|1|abbr=on}}}}

|{{flagicon|USA}} Tye Ruotolo

| align=center |November 4, 2023

| align=center |{{cite web |title=Tye Ruotolo Wins Title And $50,000 Bonus At ONE Fight Night 16 |url=https://jitsmagazine.com/tye-ruotolo-wins-title-and-50000-bonus-at-one-fight-night-16/ |website=Jitsmagazine |date=November 4, 2023 |access-date=November 4, 2023}}

| align=center |1

align=left |Lightweight
{{small|{{convert|170|lb|kg|1|abbr=on}}}}

|{{flagicon|USA}} Kade Ruotolo

| align=center |October 22, 2022

| align=center |{{Cite web|url=https://www.onefc.com/news/ruotolo-heel-hooks-kurzhev-to-capture-inaugural-one-lightweight-submission-grappling-world-title/|title=Ruotolo Heel Hooks Kurzhev To Capture Inaugural ONE Lightweight Submission Grappling World Title|publisher=ONE Championship – The Home of Martial Arts|author=Ben Coate|date=2022-08-26|access-date=2022-10-18}}

| align=center |3

align=left |Flyweight
{{small|{{convert|135|lb|kg|1|abbr=on}}}}

| {{flagicon

} Vacant

| align=center |–

class="wikitable" \|+ Women !Division !Champion !Since !Ref. !Defenses
colspan="5" align=center \|Mixed martial arts
align=left \|Strawweight {{nowrap\|{{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}}}} \|{{flagicon\|China}} Xiong Jing Nan \| align=center \|January 20, 2018 \| align=center \| \| align=center \|7
align=left rowspan=2 \|Atomweight {{small\|{{convert\|115\|lb\|kg\|1\|abbr=on}}}} \| {{flagicon\|THA}} Stamp Fairtex \| align=center \|September 30, 2023 \| align=center \|{{cite web\|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3236358/one-championship-fight-night-14-live-results-updates-and-highlights-stamp-fairtex-faces-ham-seo-hee\|title=ONE Championship Fight Night 14 results: Stamp Fairtex stops Ham Seo-hee with body-shot KO to win atomweight title\|website=South China Morning Post\|date=2023-09-30\|access-date=2023-10-08}} \| align=center \|0
{{flagicon\|PHI}} Denice Zamboanga (interim) \| align=center \|January 10, 2025 \| \| align=center \|0
colspan="5" align=center \|Kickboxing
align=left \|Strawweight {{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}} \|{{nowrap\|{{flagicon\|USA}} Jackie Buntan \| align=center \|November 9, 2024 \| align=center \| \| align=center \|0
align=left \|Atomweight {{small\|{{convert\|115\|lb\|kg\|1\|abbr=on}}}} \|{{nowrap\|{{flagicon\|THA}} Phetjeeja Lukjaoporongtom}} \| align=center \|March 9, 2024 \| align=center \| \| align=center \|2
colspan="5" align=center \|Muay Thai
align=left \|Strawweight {{small\|{{convert\|125\|lb\|kg\|1\|abbr=on}}}} \| Vacant \| align=center \| – \| align=center \| – \| align=center \| –
align=left \|Atomweight {{small\|{{convert\|115\|lb\|kg\|1\|abbr=on}}}} \|{{nowrap\|{{flagicon\|BRA}} Allycia Rodrigues}} \| align=center \|August 28, 2020 \| align=center \|{{cite web \|last1=Atkin \|first1=Nick \|title=ONE Championship: Allycia Rodrigues stuns Stamp Fairtex to take Muay Thai title in major upset \|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3099356/one-championship-allycia-rodrigues-stuns \|website=South China Morning Post \|date=2020-08-28 \|access-date=2022-10-18}} \| align=center \|3
colspan="5" align=left \|Submission grappling
align=left \|Atomweight {{small\|{{convert\|115\|lb\|kg\|1\|abbr=on}}}} \|{{nowrap\|{{flagicon\|Brazil}} Mayssa Bastos}} \| align=center \|August 3, 2024 \| align=center \| \| align=center \|1

class="wikitable"

|+ Women

!Division

!Champion

!Since

!Ref.

!Defenses

colspan="5" align=center |Mixed martial arts

align=left |Strawweight
{{nowrap|{{small|{{convert|125|lb|kg|1|abbr=on}}}}}}

|{{flagicon|China}} Xiong Jing Nan

| align=center |January 20, 2018

| align=center |

| align=center |7

align=left rowspan=2 |Atomweight
{{small|{{convert|115|lb|kg|1|abbr=on}}}}

| {{flagicon|THA}} Stamp Fairtex

| align=center |September 30, 2023

| align=center |{{cite web|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3236358/one-championship-fight-night-14-live-results-updates-and-highlights-stamp-fairtex-faces-ham-seo-hee|title=ONE Championship Fight Night 14 results: Stamp Fairtex stops Ham Seo-hee with body-shot KO to win atomweight title|website=South China Morning Post|date=2023-09-30|access-date=2023-10-08}}

| align=center |0

{{flagicon|PHI}} Denice Zamboanga (interim)

| align=center |January 10, 2025

| align=center |0

colspan="5" align=center |Kickboxing

align=left |Strawweight
{{small|{{convert|125|lb|kg|1|abbr=on}}}}

|{{nowrap|{{flagicon|USA}} Jackie Buntan

| align=center |November 9, 2024

| align=center |

| align=center |0

align=left |Atomweight
{{small|{{convert|115|lb|kg|1|abbr=on}}}}

|{{nowrap|{{flagicon|THA}} Phetjeeja Lukjaoporongtom}}

| align=center |March 9, 2024

| align=center |

| align=center |2

colspan="5" align=center |Muay Thai

align=left |Strawweight
{{small|{{convert|125|lb|kg|1|abbr=on}}}}

| Vacant

| align=center | –

align=left |Atomweight
{{small|{{convert|115|lb|kg|1|abbr=on}}}}

|{{nowrap|{{flagicon|BRA}} Allycia Rodrigues}}

| align=center |August 28, 2020

| align=center |{{cite web |last1=Atkin |first1=Nick |title=ONE Championship: Allycia Rodrigues stuns Stamp Fairtex to take Muay Thai title in major upset |url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3099356/one-championship-allycia-rodrigues-stuns |website=South China Morning Post |date=2020-08-28 |access-date=2022-10-18}}

| align=center |3

colspan="5" align=left |Submission grappling

align=left |Atomweight
{{small|{{convert|115|lb|kg|1|abbr=on}}}}

|{{nowrap|{{flagicon|Brazil}} Mayssa Bastos}}

| align=center |August 3, 2024

| align=center |

| align=center |1

Men's championship history

= Heavyweight World Championship =

::Weight limit

:::— MMA: {{convert|265|lb|kg|1|abbr=on}}

:::— Kickboxing / Muay Thai: Unlimited

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Brandon Vera {{small\|def. Paul Cheng}} \|align=center \|{{nowrap\|ONE: Spirit of Champions}} {{small\|Pasay, Philippines}} \|align=center \|Dec 11, 2015 \|align=center \|{{age in days\|2015\|12\|11\|2021\|5\|15\|show unit=full}} \| {{small\|1. def. Hideki Sekine at ONE: Age of Domination on Dec 2, 2016 {{nowrap\|2. def. Mauro Cerilli at ONE: Conquest of Champions on Nov 23, 2018}}}}
2 \|{{flagicon\|CAN}} Arjan Bhullar \|align=center\|ONE: Dangal {{small\|Kallang, Singapore}} \|align=center \| May 15, 2021 \|align=center \| 769 days \|
— \| {{flagicon\|RUS}} Anatoly Malykhin {{nowrap\|{{small\|def. Kirill Grishenko for interim title}}}} \| align=center\|ONE: Bad Blood {{small\|Kallang, Singapore}} \| align=center\| Feb 11, 2022 \| align=center\| — \|
3 \| {{flagicon\|RUS}} Anatoly Malykhin \| align=center\|ONE Friday Fights 22 {{small\|Bangkok, Thailand}} \| align=center\| Jun 23, 2023 \| align=center\| 505 days \|
4 \| {{flagicon\|SEN}} Oumar Kane \| align=center\|ONE 169 {{small\|Bangkok, Thailand}} \| align=center\| Nov 9, 2024 \| align=center\| {{age in days\|2024\|11\|09\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|UKR}} Roman Kryklia {{nowrap\|{{small\|def. Alex Roberts}}}} \|align=center \|ONE Fight Night 17 {{small\|Bangkok, Thailand}} \|align=center \| Dec 8, 2023 \|align=center \| {{age in days\|2023\|12\|08\|show unit=full}} (incumbent) \|1. def. Lyndon Knowles at ONE Fight Night 30 on April 5, 2025

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Brandon Vera
{{small|def. Paul Cheng}}

|align=center |{{nowrap|ONE: Spirit of Champions}}
{{small|Pasay, Philippines}}

|align=center |Dec 11, 2015

|align=center |{{age in days|2015|12|11|2021|5|15|show unit=full}}

{{small|1. def. Hideki Sekine at ONE: Age of Domination on Dec 2, 2016

{{nowrap|2. def. Mauro Cerilli at ONE: Conquest of Champions on Nov 23, 2018}}}}

|{{flagicon|CAN}} Arjan Bhullar

|align=center|ONE: Dangal
{{small|Kallang, Singapore}}

|align=center | May 15, 2021

|align=center | 769 days

—

| {{flagicon|RUS}} Anatoly Malykhin
{{nowrap|{{small|def. Kirill Grishenko for interim title}}}}

| align=center|ONE: Bad Blood
{{small|Kallang, Singapore}}

| align=center| Feb 11, 2022

| align=center| —

| {{flagicon|RUS}} Anatoly Malykhin

| align=center|ONE Friday Fights 22
{{small|Bangkok, Thailand}}

| align=center| Jun 23, 2023

| align=center| 505 days

| {{flagicon|SEN}} Oumar Kane

| align=center|ONE 169
{{small|Bangkok, Thailand}}

| align=center| Nov 9, 2024

| align=center| {{age in days|2024|11|09|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|UKR}} Roman Kryklia
{{nowrap|{{small|def. Alex Roberts}}}}

|align=center |ONE Fight Night 17
{{small|Bangkok, Thailand}}

|align=center | Dec 8, 2023

|align=center | {{age in days|2023|12|08|show unit=full}}
(incumbent)

|1. def. Lyndon Knowles at ONE Fight Night 30 on April 5, 2025

= Light Heavyweight World Championship =

::Weight limit: {{convert|225|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|BRA}} Roger Gracie {{small\|def. Michal Pasternak}} \|align=center \|{{nowrap\|ONE: Ascent to Power}} {{small\|Kallang, Singapore}} \|align=center \|May 6, 2016 \|align=center \|{{age in days\|2016\|5\|6\|2017\|10\|14\|show unit=full}} \|
colspan=6 align=center \|The title was vacated after Roger Gracie announced his retirement from MMA on October 14, 2017.{{cite web\|url=https://www.mmafighting.com/2017/10/14/16474258/one-champion-roger-gracie-retires-mma\|title=ONE champion Roger Gracie retires from MMA\|date=14 October 2017 \|publisher=}}
2 \|{{flagicon\|MMR}} Aung La Nsang {{nowrap\|{{small\|def. Alexandre Machado}}}} \|align=center \|ONE: Quest for Gold {{small\|Yangon, Myanmar}} \|align=center \|Feb 23, 2018 \|align=center \|{{age in days\|2018\|2\|23\|2021\|4\|28\|show unit=full}} \| {{small\|{{nowrap\|1. def. Brandon Vera at ONE: Century − Part 2 on Oct 13, 2019}}}}
3 \|{{flagicon\|NED}} Reinier de Ridder \|align=center \|ONE on TNT 4 {{small\|Kallang, Singapore}} \|align=center \|Apr 28, 2021 \|align=center \|{{age in days\|2021\|4\|28\|2022\|12\|3\|show unit=full}} \|
4 \|{{nowrap\|{{flagicon\|RUS}} Anatoly Malykhin}} \|align=center \|{{nowrap\|ONE on Prime Video 5}} {{small\|Pasay, Philippines}} \|align=center \|Dec 3, 2022 \|align=center \|{{age in days\|2022\|12\|03\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|UKR}} Roman Kryklia}} {{small\|def. Tarik Khbabez}} \|align=center \| {{nowrap\|ONE: Age Of Dragons}} {{small\|Beijing, China}} \|align=center \|Nov 16, 2019 \|align=center \|{{age in days\|2019\|11\|16\|show unit=full}} (incumbent) \| {{small\|{{nowrap\|1. def. Andrei Stoica at ONE: Collision Course on Dec 18, 2020}} 2. def. Murat Aygün at ONE: Full Circle on Feb 25, 2022}}

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|BRA}} Roger Gracie
{{small|def. Michal Pasternak}}

|align=center |{{nowrap|ONE: Ascent to Power}}
{{small|Kallang, Singapore}}

|align=center |May 6, 2016

|align=center |{{age in days|2016|5|6|2017|10|14|show unit=full}}

colspan=6 align=center |The title was vacated after Roger Gracie announced his retirement from MMA on October 14, 2017.{{cite web|url=https://www.mmafighting.com/2017/10/14/16474258/one-champion-roger-gracie-retires-mma|title=ONE champion Roger Gracie retires from MMA|date=14 October 2017 |publisher=}}

|{{flagicon|MMR}} Aung La Nsang
{{nowrap|{{small|def. Alexandre Machado}}}}

|align=center |ONE: Quest for Gold
{{small|Yangon, Myanmar}}

|align=center |Feb 23, 2018

|align=center |{{age in days|2018|2|23|2021|4|28|show unit=full}}

{{small|{{nowrap|1. def. Brandon Vera at ONE: Century − Part 2 on Oct 13, 2019}}}}

|{{flagicon|NED}} Reinier de Ridder

|align=center |ONE on TNT 4
{{small|Kallang, Singapore}}

|align=center |Apr 28, 2021

|align=center |{{age in days|2021|4|28|2022|12|3|show unit=full}}

|{{nowrap|{{flagicon|RUS}} Anatoly Malykhin}}

|align=center |{{nowrap|ONE on Prime Video 5}}
{{small|Pasay, Philippines}}

|align=center |Dec 3, 2022

|align=center |{{age in days|2022|12|03|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|UKR}} Roman Kryklia}}
{{small|def. Tarik Khbabez}}

|align=center | {{nowrap|ONE: Age Of Dragons}}
{{small|Beijing, China}}

|align=center |Nov 16, 2019

|align=center |{{age in days|2019|11|16|show unit=full}}
(incumbent)

{{small|{{nowrap|1. def. Andrei Stoica at ONE: Collision Course on Dec 18, 2020}}

2. def. Murat Aygün at ONE: Full Circle on Feb 25, 2022}}

= Middleweight World Championship =

::Weight limit: {{convert|205|lb|kg|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|KAZ}} Igor Svirid {{small\|def. Leandro Ataides}} \|align=center \|{{nowrap\|ONE: Battle of the Lions}} {{small\|Kallang, Singapore}} \|align=center \|Nov 7, 2014 \|align=center \|{{age in days\|2014\|11\|7\|2015\|10\|9\|show unit=full}} \|
2 \|{{flagicon\|RUS}} Vitaly Bigdash \|align=center \|ONE: Tigers of Asia {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Oct 9, 2015 \|align=center \|{{age in days\|2015\|10\|9\|2017\|6\|30\|show unit=full}} \| {{small\|1. def. Aung La Nsang at ONE: Quest for Power on Jan 14, 2017}}
3 \|{{flagicon\|MMR}} Aung La Nsang \|align=center \|ONE: Light of a Nation {{small\|Yangon, Myanmar}} \|align=center \|Jun 30, 2017 \|align=center \|{{age in days\|2017\|6\|30\|2020\|10\|30\|show unit=full}} \| {{small\|1. def. Ken Hasegawa at ONE: Spirit of a Warrior on Jun 29, 2018 {{nowrap\|2. def. Mohammad Karaki at ONE: Pursuit of Greatness on Oct 26, 2018}} 3. def. Ken Hasegawa at ONE: A New Era on Mar 31, 2019}}
4 \|{{nowrap\|{{flagicon\|NED}} Reinier de Ridder}} \|align=center \|ONE: Inside the Matrix {{small\|Kallang, Singapore}} \|align=center \|Oct 30, 2020 \|align=center \|{{age in days\|2020\|10\|30\|2024\|3\|1\|show unit=full}} \| {{small\|1. def. Kiamrian Abbasov at ONE: Full Circle on Feb 25, 2022 2. def. Vitaly Bigdash at ONE 159 on Jul 22, 2022}}
5 \|{{nowrap\|{{flagicon\|RUS}} Anatoly Malykhin}} \|align=center \|{{nowrap\|ONE 166}} {{small\|Lusail, Qatar}} \|align=center \|Mar 1, 2024 \|align=center \|{{age in days\|2024\|3\|1\|show unit=full}} (incumbent) \|

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|KAZ}} Igor Svirid
{{small|def. Leandro Ataides}}

|align=center |{{nowrap|ONE: Battle of the Lions}}
{{small|Kallang, Singapore}}

|align=center |Nov 7, 2014

|align=center |{{age in days|2014|11|7|2015|10|9|show unit=full}}

|{{flagicon|RUS}} Vitaly Bigdash

|align=center |ONE: Tigers of Asia
{{small|Kuala Lumpur, Malaysia}}

|align=center |Oct 9, 2015

|align=center |{{age in days|2015|10|9|2017|6|30|show unit=full}}

{{small|1. def. Aung La Nsang at ONE: Quest for Power on Jan 14, 2017}}

|{{flagicon|MMR}} Aung La Nsang

|align=center |ONE: Light of a Nation
{{small|Yangon, Myanmar}}

|align=center |Jun 30, 2017

|align=center |{{age in days|2017|6|30|2020|10|30|show unit=full}}

{{small|1. def. Ken Hasegawa at ONE: Spirit of a Warrior on Jun 29, 2018

{{nowrap|2. def. Mohammad Karaki at ONE: Pursuit of Greatness on Oct 26, 2018}}

3. def. Ken Hasegawa at ONE: A New Era on Mar 31, 2019}}

|{{nowrap|{{flagicon|NED}} Reinier de Ridder}}

|align=center |ONE: Inside the Matrix
{{small|Kallang, Singapore}}

|align=center |Oct 30, 2020

|align=center |{{age in days|2020|10|30|2024|3|1|show unit=full}}

{{small|1. def. Kiamrian Abbasov at ONE: Full Circle on Feb 25, 2022

2. def. Vitaly Bigdash at ONE 159 on Jul 22, 2022}}

|{{nowrap|{{flagicon|RUS}} Anatoly Malykhin}}

|align=center |{{nowrap|ONE 166}}
{{small|Lusail, Qatar}}

|align=center |Mar 1, 2024

|align=center |{{age in days|2024|3|1|show unit=full}}
(incumbent)

= Welterweight World Championship =

::Weight limit: {{convert|185|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|align=left \|{{flagicon\|JPN}} Nobutatsu Suzuki {{small\|def. Brock Larson}} \|align=center \| ONE: War of Nations {{small\|Kuala Lumpur, Malaysia}} \|align=center \| Mar 14, 2014 \|align=center \| {{age in days\|2014\|3\|14\|2014\|8\|29\|show unit=full}} \|
2 \|align=left \|{{flagicon\|USA}} Ben Askren \|align=center \|{{nowrap\|ONE: Reign of Champions}} {{small\|Dubai, United Arab Emirates}} \|align=center \| Aug 29, 2014 \|align=center \| {{age in days\|2014\|8\|29\|2018\|10\|27\|show unit=full}} \| {{small\|{{nowrap\|NC. against Luis Santos at ONE: Valor of Champions on Apr 24, 2015}} 1. def. Agilan Thani at ONE: Dynasty of Heroes on May 26, 2017 2. def. Zebaztian Kadestam at ONE: Shanghai on Sep 2, 2017 3. def. Shinya Aoki at ONE: Immortal Pursuit on Nov 24, 2017}}
colspan=6 align=center \|Askren vacated the title on October 27, 2018 when he was released from his contract.{{cite web \|title=Historic trade finalized: Ben Askren heads to UFC, Demetrious Johnson to ONE \|url=https://www.mmafighting.com/2018/10/27/18032850/historic-trade-reportedly-finalized-ben-askren-heads-to-ufc-demetrious-johnson-to-one \|website=MMA Fighting \|date=27 October 2018 \|access-date=January 5, 2023}}
3 \|align=left \|{{nowrap\|{{flagicon\|SWE}} Zebaztian Kadestam}} {{small\|def. Tyler McGuire}} \|align=center \|ONE: Warrior's Dream {{small\|Jakarta, Indonesia}} \|align=center \| Nov 17, 2018 \|align=center \| {{age in days\|2018\|11\|17\|2019\|10\|25\|show unit=full}} \| {{small\|1. def. Georgiy Kichigin at ONE: Reign of Valor on Mar 8, 2019}}
4 \|align=left \|{{flagicon\|KGZ}} Kiamrian Abbasov \|align=center \|ONE: Dawn Of Valor {{small\|Jakarta, Indonesia}} \|align=center \| Oct 25, 2019 \|align=center \| {{age in days\|2019\|10\|25\|2022\|11\|17\|show unit=full}} \| {{nowrap\|{{small\|1. def. James Nakashima at ONE: Inside the Matrix 2 on Nov 6, 2020}}}}
colspan=6 align=center \|Abbasov was stripped of the title on November 17, 2022, after failing to make weight for his title defense against Christian Lee at ONE on Prime Video 4.{{Cite web \|last=Martin \|first=Damon \|date=2022-09-28 \|title=Kiamrian Abbasov stripped of welterweight title after missing weight ahead of ONE on Prime Video 4 \|url=https://www.mmafighting.com/2022/11/17/23464412/kiamrian-abbasov-stripped-of-welterweight-title-after-missing-weight-ahead-of-one-on-prime-video-4 \|access-date=2022-11-17 \|website=MMA Fighting \|language=en}}
5 \|{{nowrap\|{{flagicon\|USA}} Christian Lee}} {{small\|def. Kiamrian Abbasov}} \|align=center \|ONE on Prime Video 4 {{small\|Kallang, Singapore}} \|align=center \|Nov 19, 2022 \|align=center \|{{age in days\|2022\|11\|19\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#FF7F7F"\|Submission grappling
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Tye Ruotolo {{small\|def. Magomed Abdulkadirov}} \|align=center \|ONE Fight Night 16 {{small\|Bangkok, Thailand}} \|align=center \| Nov 4, 2023 \|align=center \| {{age in days\|2023\|11\|04\|show unit=full}} (incumbent) \| {{small\|1. def. Izaak Michell at ONE Fight Night 21 on Apr 6, 2024}}

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|align=left |{{flagicon|JPN}} Nobutatsu Suzuki
{{small|def. Brock Larson}}

|align=center | ONE: War of Nations
{{small|Kuala Lumpur, Malaysia}}

|align=center | Mar 14, 2014

|align=center | {{age in days|2014|3|14|2014|8|29|show unit=full}}

|align=left |{{flagicon|USA}} Ben Askren

|align=center |{{nowrap|ONE: Reign of Champions}}
{{small|Dubai, United Arab Emirates}}

|align=center | Aug 29, 2014

|align=center | {{age in days|2014|8|29|2018|10|27|show unit=full}}

{{small|{{nowrap|NC. against Luis Santos at ONE: Valor of Champions on Apr 24, 2015}}

1. def. Agilan Thani at ONE: Dynasty of Heroes on May 26, 2017

2. def. Zebaztian Kadestam at ONE: Shanghai on Sep 2, 2017

3. def. Shinya Aoki at ONE: Immortal Pursuit on Nov 24, 2017}}

colspan=6 align=center |Askren vacated the title on October 27, 2018 when he was released from his contract.{{cite web |title=Historic trade finalized: Ben Askren heads to UFC, Demetrious Johnson to ONE |url=https://www.mmafighting.com/2018/10/27/18032850/historic-trade-reportedly-finalized-ben-askren-heads-to-ufc-demetrious-johnson-to-one |website=MMA Fighting |date=27 October 2018 |access-date=January 5, 2023}}

|align=left |{{nowrap|{{flagicon|SWE}} Zebaztian Kadestam}}
{{small|def. Tyler McGuire}}

|align=center |ONE: Warrior's Dream
{{small|Jakarta, Indonesia}}

|align=center | Nov 17, 2018

|align=center | {{age in days|2018|11|17|2019|10|25|show unit=full}}

{{small|1. def. Georgiy Kichigin at ONE: Reign of Valor on Mar 8, 2019}}

|align=left |{{flagicon|KGZ}} Kiamrian Abbasov

|align=center |ONE: Dawn Of Valor
{{small|Jakarta, Indonesia}}

|align=center | Oct 25, 2019

|align=center | {{age in days|2019|10|25|2022|11|17|show unit=full}}

{{nowrap|{{small|1. def. James Nakashima at ONE: Inside the Matrix 2 on Nov 6, 2020}}}}

colspan=6 align=center |Abbasov was stripped of the title on November 17, 2022, after failing to make weight for his title defense against Christian Lee at ONE on Prime Video 4.{{Cite web |last=Martin |first=Damon |date=2022-09-28 |title=Kiamrian Abbasov stripped of welterweight title after missing weight ahead of ONE on Prime Video 4 |url=https://www.mmafighting.com/2022/11/17/23464412/kiamrian-abbasov-stripped-of-welterweight-title-after-missing-weight-ahead-of-one-on-prime-video-4 |access-date=2022-11-17 |website=MMA Fighting |language=en}}

|{{nowrap|{{flagicon|USA}} Christian Lee}}
{{small|def. Kiamrian Abbasov}}

|align=center |ONE on Prime Video 4
{{small|Kallang, Singapore}}

|align=center |Nov 19, 2022

|align=center |{{age in days|2022|11|19|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#FF7F7F"|Submission grappling

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Tye Ruotolo
{{small|def. Magomed Abdulkadirov}}

|align=center |ONE Fight Night 16
{{small|Bangkok, Thailand}}

|align=center | Nov 4, 2023

|align=center | {{age in days|2023|11|04|show unit=full}}
(incumbent)

{{small|1. def. Izaak Michell at ONE Fight Night 21 on Apr 6, 2024}}

= Lightweight World Championship=

::Weight limit: {{convert|170|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|JPN}} Kotetsu Boku {{small\|def. Zorobabel Moreira}} \|align=center \|ONE: Rise of Kings {{small\|Kallang, Singapore}} \|align=center \|Oct 6, 2012 \|align=center \|{{age in days\|2012\|10\|6\|2013\|4\|5\|show unit=full}} \|
2 \|{{flagicon\|JPN}} Shinya Aoki \|align=center \|ONE: Kings and Champions {{small\|Kallang, Singapore}} \|align=center \|Apr 5, 2013 \|align=center \|{{age in days\|2013\|4\|5\|2016\|11\|11\|show unit=full}} \| {{nowrap\|{{small\|1. def. Kamal Shalorus at ONE: Reign of Champions on Aug 29, 2014}}}} {{small\|2. def. Koji Ando at ONE: Warrior's Quest on May 22, 2015}}
3 \|{{flagicon\|PHI}} Eduard Folayang \|align=center \|ONE: Defending Honor {{small\|Kallang, Singapore}} \|align=center \|Nov 11, 2016 \|align=center \|{{age in days\|2016\|11\|11\|2017\|11\|10\|show unit=full}} \| {{small\|1. def. Ev Ting at ONE: Kings of Destiny on Apr 21, 2017}}
4 \|{{flagicon\|AUS}} Martin Nguyen \|align=center \|ONE: Legends of the World {{small\|Pasay, Philippines}} \|align=center \|Nov 10, 2017 \|align=center \|{{age in days\|2017\|11\|10\|2018\|9\|28\|show unit=full}} \|
colspan=6 align=center \|Nguyen vacated the title on September 28, 2018 due to suffering an injury in training, rendering him unable to defend the title.{{cite web\|url=https://www.onefc.com/articles/martin-nguyen-vacates-one-lightweight-world-title-due-to-injury/\|title=Martin Nguyen Vacates ONE Lightweight World Title Due To Injury - ONE Championship\|date=28 September 2018\|website=www.onefc.com}}
5 \|{{nowrap\|{{flagicon\|PHI}} Eduard Folayang {{small\|(2)}}}} {{small\|def. Amir Khan}} \|align=center \|{{nowrap\|ONE: Conquest of Champions}} {{small\|Pasay, Philippines}} \|align=center \|Nov 23, 2018 \|align=center \|{{age in days\|2018\|11\|23\|2019\|3\|31\|show unit=full}} (492 days) \|
6 \|{{flagicon\|JPN}} Shinya Aoki {{small\|(2)}} \|align=center \|ONE: A New Era {{small\|Tokyo, Japan}} \|align=center \|Mar 31, 2019 \|align=center \|{{age in days\|2019\|3\|31\|2019\|5\|17\|show unit=full}} (1410 days) \|
7 \|{{flagicon\|USA}} Christian Lee \|align=center \|ONE: Enter the Dragon {{small\|Kallang, Singapore}} \|align=center \|May 17, 2019 \|align=center \|{{age in days\|2019\|5\|17\|2021\|9\|24\|show unit=full}} \| {{small\|1. def. Iuri Lapicus at ONE: Inside the Matrix on Oct 30, 2020 {{nowrap\|2. def. Timofey Nastyukhin at ONE on TNT 2 on Apr 14, 2021}}}}
8 \|{{flagicon\|KOR}} Ok Rae-yoon \|align=center \|ONE: Revolution {{small\|Kallang, Singapore}} \|align=center \|Sep 24, 2021 \|align=center \|{{age in days\|2021\|9\|24\|2022\|8\|26\|show unit=full}} \|
9 \|{{flagicon\|USA}} Christian Lee {{small\|(2)}} \|align=center \|ONE 160 {{small\|Kallang, Singapore}} \|align=center \|Aug 26, 2022 \|align=center \|{{age in days\|2022\|08\|26\|show unit=full}} (incumbent) \|NC. against Alibeg Rasulov at ONE Fight Night 26 on Dec 7, 2024
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|SUR}} Regian Eersel}} {{nowrap\|{{small\|def. Nieky Holzken}}}} \|align=center \|{{nowrap\|ONE: Enter the Dragon}} {{small\|Kallang, Singapore}} \|align=center \|May 17, 2019 \|align=center \|{{age in days\|2019\|05\|17\|2024\|04\|06\|show unit=full}} \| {{small\|1. def. Nieky Holzken at ONE: Dawn Of Valor on Oct 25, 2019 2. def. Mustapha Haida at ONE: Fists Of Fury 3 on Feb 26, 2021 {{nowrap\|3. def. Islam Murtazaev at ONE: Winter Warriors on Dec 3, 2021}} 4. def. Arian Sadiković at ONE 156 on Apr 22, 2022}}
2 \|{{flagicon\|FRA}} Alexis Nicolas \|align=center \|ONE Fight Night 21 {{small\|Bangkok, Thailand}} \|align=center \|April 6, 2024 \|align=center \|182 days \|
3 \|{{flagicon\|SUR}} Regian Eersel {{small\|(2)}} \|align=center \|ONE Fight Night 25 {{small\|Bangkok, Thailand}} \|align=center \|Oct 5, 2024 \|align=center \|180 days (1966 days) \|
colspan=6 align=center \|Eersel was stripped of the title on April 3, 2025, after failing to hydration test for his title defense against Alexis Nicolas at ONE Fight Night 30.
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|SUR}} Regian Eersel {{nowrap\|{{small\|def. Sinsamut Klinmee}}}} \|align=center \|ONE on Prime Video 3 {{small\|Kuala Lumpur, Malaysia}} \|align=center \| Oct 22, 2022 \|align=center \| {{age in days\|2022\|10\|22\|show unit=full}} (incumbent) \| {{small\|1. def. Sinsamut Klinmee at ONE Friday Fights 9 on Mar 17, 2023 2. def. Dmitry Menshikov at ONE Fight Night 11 on June 9, 2023}}
align=left colspan="6" bgcolor="#FF7F7F"\|Submission grappling
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Kade Ruotolo {{nowrap\|{{small\|def. Uali Kurzhev}}}} \|align=center \|ONE on Prime Video 3 {{small\|Kuala Lumpur, Malaysia}} \|align=center \| Oct 22, 2022 \|align=center \| {{age in days\|2022\|10\|22\|show unit=full}} (incumbent) \| {{small\|1. def. Matheus Gabriel at ONE on Prime Video 5 on Dec 3, 2022 2. def. Tommy Langaker at ONE Fight Night 11 on June 9, 2023 3. def. Tommy Langaker at ONE 165 on January 28, 2024}}

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|JPN}} Kotetsu Boku
{{small|def. Zorobabel Moreira}}

|align=center |ONE: Rise of Kings
{{small|Kallang, Singapore}}

|align=center |Oct 6, 2012

|align=center |{{age in days|2012|10|6|2013|4|5|show unit=full}}

|{{flagicon|JPN}} Shinya Aoki

|align=center |ONE: Kings and Champions
{{small|Kallang, Singapore}}

|align=center |Apr 5, 2013

|align=center |{{age in days|2013|4|5|2016|11|11|show unit=full}}

{{nowrap|{{small|1. def. Kamal Shalorus at ONE: Reign of Champions on Aug 29, 2014}}}}

{{small|2. def. Koji Ando at ONE: Warrior's Quest on May 22, 2015}}

|{{flagicon|PHI}} Eduard Folayang

|align=center |ONE: Defending Honor
{{small|Kallang, Singapore}}

|align=center |Nov 11, 2016

|align=center |{{age in days|2016|11|11|2017|11|10|show unit=full}}

{{small|1. def. Ev Ting at ONE: Kings of Destiny on Apr 21, 2017}}

|{{flagicon|AUS}} Martin Nguyen

|align=center |ONE: Legends of the World
{{small|Pasay, Philippines}}

|align=center |Nov 10, 2017

|align=center |{{age in days|2017|11|10|2018|9|28|show unit=full}}

colspan=6 align=center |Nguyen vacated the title on September 28, 2018 due to suffering an injury in training, rendering him unable to defend the title.{{cite web|url=https://www.onefc.com/articles/martin-nguyen-vacates-one-lightweight-world-title-due-to-injury/|title=Martin Nguyen Vacates ONE Lightweight World Title Due To Injury - ONE Championship|date=28 September 2018|website=www.onefc.com}}

|{{nowrap|{{flagicon|PHI}} Eduard Folayang {{small|(2)}}}}
{{small|def. Amir Khan}}

|align=center |{{nowrap|ONE: Conquest of Champions}}
{{small|Pasay, Philippines}}

|align=center |Nov 23, 2018

|align=center |{{age in days|2018|11|23|2019|3|31|show unit=full}}
(492 days)

|{{flagicon|JPN}} Shinya Aoki {{small|(2)}}

|align=center |ONE: A New Era
{{small|Tokyo, Japan}}

|align=center |Mar 31, 2019

|align=center |{{age in days|2019|3|31|2019|5|17|show unit=full}}
(1410 days)

|{{flagicon|USA}} Christian Lee

|align=center |ONE: Enter the Dragon
{{small|Kallang, Singapore}}

|align=center |May 17, 2019

|align=center |{{age in days|2019|5|17|2021|9|24|show unit=full}}

{{small|1. def. Iuri Lapicus at ONE: Inside the Matrix on Oct 30, 2020

{{nowrap|2. def. Timofey Nastyukhin at ONE on TNT 2 on Apr 14, 2021}}}}

|{{flagicon|KOR}} Ok Rae-yoon

|align=center |ONE: Revolution
{{small|Kallang, Singapore}}

|align=center |Sep 24, 2021

|align=center |{{age in days|2021|9|24|2022|8|26|show unit=full}}

|{{flagicon|USA}} Christian Lee {{small|(2)}}

|align=center |ONE 160
{{small|Kallang, Singapore}}

|align=center |Aug 26, 2022

|align=center |{{age in days|2022|08|26|show unit=full}}
(incumbent)

|NC. against Alibeg Rasulov at ONE Fight Night 26 on Dec 7, 2024

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|SUR}} Regian Eersel}}
{{nowrap|{{small|def. Nieky Holzken}}}}

|align=center |{{nowrap|ONE: Enter the Dragon}}
{{small|Kallang, Singapore}}

|align=center |May 17, 2019

|align=center |{{age in days|2019|05|17|2024|04|06|show unit=full}}

{{small|1. def. Nieky Holzken at ONE: Dawn Of Valor on Oct 25, 2019

2. def. Mustapha Haida at ONE: Fists Of Fury 3 on Feb 26, 2021

{{nowrap|3. def. Islam Murtazaev at ONE: Winter Warriors on Dec 3, 2021}}

4. def. Arian Sadiković at ONE 156 on Apr 22, 2022}}

|{{flagicon|FRA}} Alexis Nicolas

|align=center |ONE Fight Night 21
{{small|Bangkok, Thailand}}

|align=center |April 6, 2024

|align=center |182 days

|{{flagicon|SUR}} Regian Eersel {{small|(2)}}

|align=center |ONE Fight Night 25
{{small|Bangkok, Thailand}}

|align=center |Oct 5, 2024

|align=center |180 days (1966 days)

colspan=6 align=center |Eersel was stripped of the title on April 3, 2025, after failing to hydration test for his title defense against Alexis Nicolas at ONE Fight Night 30.

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|SUR}} Regian Eersel
{{nowrap|{{small|def. Sinsamut Klinmee}}}}

|align=center |ONE on Prime Video 3
{{small|Kuala Lumpur, Malaysia}}

|align=center | Oct 22, 2022

|align=center | {{age in days|2022|10|22|show unit=full}}
(incumbent)

{{small|1. def. Sinsamut Klinmee at ONE Friday Fights 9 on Mar 17, 2023

2. def. Dmitry Menshikov at ONE Fight Night 11 on June 9, 2023}}

align=left colspan="6" bgcolor="#FF7F7F"|Submission grappling

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Kade Ruotolo
{{nowrap|{{small|def. Uali Kurzhev}}}}

|align=center |ONE on Prime Video 3
{{small|Kuala Lumpur, Malaysia}}

|align=center | Oct 22, 2022

|align=center | {{age in days|2022|10|22|show unit=full}}
(incumbent)

{{small|1. def. Matheus Gabriel at ONE on Prime Video 5 on Dec 3, 2022

2. def. Tommy Langaker at ONE Fight Night 11 on June 9, 2023

3. def. Tommy Langaker at ONE 165 on January 28, 2024}}

= Featherweight World Championship =

::Weight limit: {{convert|155|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|PHI}} Honorio Banario {{small\|def. Eric Kelly}} \|align=center \|ONE: Return of Warriors {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Feb 2, 2013 \|align=center \|{{age in days\|2013\|2\|2\|2013\|5\|31\|show unit=full}} \|
2 \|{{flagicon\|JPN}} Koji Oishi \|align=center \|ONE FC: Rise to Power {{small\|Pasay, Philippines}} \|align=center \|May 31, 2013 \|align=center \|{{age in days\|2013\|5\|31\|2014\|8\|29\|show unit=full}} \| {{small\|1. def. Honorio Banario at ONE: Moment of Truth on Dec 6, 2013}}
3 \|{{nowrap\|{{flagicon\|MNG}} Jadamba Narantungalag}} \|align=center \|ONE: Reign of Champions {{small\|Dubai, United Arab Emirates}} \|align=center \|Aug 29, 2014 \|align=center \|{{age in days\|2014\|8\|29\|2015\|11\|21\|show unit=full}} \|
— \|{{flagicon\|RUS}} Marat Gafurov {{small\|def. Martin Nguyen for interim title}} \|align=center \|ONE: Odyssey of Champions {{small\|Jakarta, Indonesia}} \|align=center \|Sep 27, 2015 \|align=center \|— \|
4 \|{{flagicon\|RUS}} Marat Gafurov \|align=center \|{{nowrap\|ONE: Dynasty of Champions 3}} {{small\|Beijing, China}} \|align=center \|Nov 21, 2015 \|align=center \|{{age in days\|2015\|11\|21\|2017\|8\|18\|show unit=full}} \| {{small\|1. def. Kazunori Yokota at ONE: Kingdom of Champions on May 27, 2016 {{nowrap\|2. def. Jadamba Narantungalag at ONE: Defending Honor on Nov 11, 2016}}}}
5 \|{{flagicon\|AUS}} Martin Nguyen \|align=center \|ONE: Quest for Greatness {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Aug 18, 2017 \|align=center \|{{age in days\|2017\|8\|18\|2020\|10\|30\|show unit=full}} \| {{small\|1. def. Christian Lee at ONE: Unstoppable Dreams on May 18, 2018. {{nowrap\|2. def. Jadamba Narantungalag at ONE: Roots of Honor on Apr 12, 2019}} 3. def. Koyomi Matsushima at ONE: Dawn of Heroes on Aug 2, 2019}}
6 \|{{flagicon\|USA}} Thanh Le \|align=center \|ONE: Inside the Matrix {{small\|Kallang, Singapore}} \|align=center \|Oct 30, 2020 \|align=center \|{{age in days\|2020\|10\|30\|2022\|8\|26\|show unit=full}} \| {{small\|1. def. Garry Tonon at ONE: Lights Out on Mar 11, 2022}}
7 \|{{flagicon\|CHN}} Tang Kai \|align=center \|ONE 160 {{small\|Kallang, Singapore}} \|align=center \|Aug 26, 2022 \|align=center \|{{age in days\|2022\|08\|26\|show unit=full}} (incumbent) \| {{small\|1. def. Interim champion Thanh Le at ONE 166 on Mar 1, 2024}}
— \|{{flagicon\|USA}} Thanh Le {{nowrap\|{{small\|def. Ilya Freymanov for interim title}}}} \|align=center \|ONE Fight Night 15 {{small\|Bangkok, Thailand}} \|align=center \|Oct 7, 2023 \|align=center \|— \|
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Superbon Singha Mawynn}} {{small\|def. Giorgio Petrosyan}} \|align=center \|{{nowrap\|ONE: First Strike}} {{small\|Kallang, Singapore}} \|align=center \|Oct 15, 2021 \|align=center \|{{age in days\|2021\|10\|15\|2023\|1\|14\|show unit=full}} \|{{nowrap\|{{small\|1. def. Marat Grigorian on ONE: X at Mar 26, 2022}}}}
2 \|{{flagicon\|BLR}} Chingiz Allazov \|align=center \|ONE Fight Night 6 {{small\|Bangkok, Thailand}} \|align=center \|Jan 14, 2023 \|align=center \|{{age in days\|2023\|01\|14\|2024\|8\|31\|show unit=full}} \| {{small\|{{nowrap\|1. def. Marat Grigorian at ONE Fight Night 13 on Aug 5, 2023}}}}
— \|{{flagicon\|THA}} Superbon Singha Mawynn {{nowrap\|{{small\|def. Marat Grigorian for interim title}}}} \|align=center \|ONE Friday Fights 58 {{small\|Bangkok, Thailand}} \|align=center \|Apr 5, 2024 \| align=center \|— \|
colspan=6 align=center \|''Allazov vacated the title on August 31, 2024, when he was released from his contract.{{Cite web \|date=2024-08-26 \|title=Exclusive: Chingiz Allazov to Vacate Kickboxing World Title: "I'm done fighting in ONE Championship" \|url=https://www.lowkickmma.com/chingiz-allazov-vacate-kickboxing-title-in-one/ \|access-date=2025-01-05 \|website=www.lowkickmma.com \|language=en-US}} Interim champion Superbon was officially promoted to undisputed champion on January 6, 2025.''{{Cite web \|date=2025-01-06 \|title=ONE Championship: Chingiz Allazov stripped of title, Superbon elevated to featherweight kickboxing champion \|url=https://www.bangkokpost.com/sports/2934030/one-championship-chingiz-allazov-stripped-of-title-superbon-elevated-to-featherweight-kickboxing-champion \|access-date=2025-01-06 \|website=Bangkok Post \|language=en}}
3 \|{{nowrap\|{{flagicon\|THA}} Superbon Singha Mawynn {{small\|(2)}}}} {{small\|promoted to undisputed champion}} \|align=center \|– \|align=center \|Jan 6, 2025 \|align=center \|{{age in days\|2025\|01\|06\|show unit=full}} (incumbent) \|
– \|{{flagicon\|JPN}} Masaaki Noiri {{small\|{{nowrap\|def. Tawanchai P.K.Saenchai for interim title}}}} \| align=center\|ONE 172 {{small\|Saitama, Japan}} \| align=center\| Mar 23, 2025 \| align=center\| {{age in days\|2025\|3\|22\|\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Petchmorakot Petchyindee}} {{nowrap\|{{small\|def. Pongsiri P.K.Saenchai}}}} \|align=center \|{{nowrap\|ONE: Warrior's Code}} {{small\|Jakarta, Indonesia}} \|align=center \|Feb 7, 2020 \|align=center \|{{age in days\|2020\|2\|7\|2022\|9\|29\|show unit=full}} \| {{small\|1. def. Yodsanklai Fairtex at ONE: No Surrender on Jul 31, 2020 {{nowrap\|2. def. Magnus Andersson at ONE: A New Breed 3 on Sep 18, 2020}} 3. def. Jimmy Vienot at ONE 157 on May 20, 2022}}
2 \|{{flagicon\|THA}} Tawanchai P.K.Saenchai \|align=center \|{{nowrap\|ONE 161}} {{small\|Kallang, Singapore}} \|align=center \|Sep 29, 2022 \|align=center \|{{age in days\|2022\|09\|29\|show unit=full}} (incumbent) \| {{small\|1. def. Jamal Yusupov at ONE Fight Night 7 on Feb 25, 2023 {{nowrap\|2. def. Superbon Singha Mawynn at ONE Friday Fights 46 on Dec 22, 2023}}}} {{small\|3. def. Jo Nattawut at ONE 167 on Jun 7, 2024}} {{small\|4. def. Superbon Singha Mawynn at ONE 170 on Jan 24, 2025}}

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|PHI}} Honorio Banario
{{small|def. Eric Kelly}}

|align=center |ONE: Return of Warriors
{{small|Kuala Lumpur, Malaysia}}

|align=center |Feb 2, 2013

|align=center |{{age in days|2013|2|2|2013|5|31|show unit=full}}

|{{flagicon|JPN}} Koji Oishi

|align=center |ONE FC: Rise to Power
{{small|Pasay, Philippines}}

|align=center |May 31, 2013

|align=center |{{age in days|2013|5|31|2014|8|29|show unit=full}}

{{small|1. def. Honorio Banario at ONE: Moment of Truth on Dec 6, 2013}}

|{{nowrap|{{flagicon|MNG}} Jadamba Narantungalag}}

|align=center |ONE: Reign of Champions
{{small|Dubai, United Arab Emirates}}

|align=center |Aug 29, 2014

|align=center |{{age in days|2014|8|29|2015|11|21|show unit=full}}

—

|{{flagicon|RUS}} Marat Gafurov
{{small|def. Martin Nguyen for interim title}}

|align=center |ONE: Odyssey of Champions
{{small|Jakarta, Indonesia}}

|align=center |Sep 27, 2015

|align=center |—

|{{flagicon|RUS}} Marat Gafurov

|align=center |{{nowrap|ONE: Dynasty of Champions 3}}
{{small|Beijing, China}}

|align=center |Nov 21, 2015

|align=center |{{age in days|2015|11|21|2017|8|18|show unit=full}}

{{small|1. def. Kazunori Yokota at ONE: Kingdom of Champions on May 27, 2016

{{nowrap|2. def. Jadamba Narantungalag at ONE: Defending Honor on Nov 11, 2016}}}}

|{{flagicon|AUS}} Martin Nguyen

|align=center |ONE: Quest for Greatness
{{small|Kuala Lumpur, Malaysia}}

|align=center |Aug 18, 2017

|align=center |{{age in days|2017|8|18|2020|10|30|show unit=full}}

{{small|1. def. Christian Lee at ONE: Unstoppable Dreams on May 18, 2018.

{{nowrap|2. def. Jadamba Narantungalag at ONE: Roots of Honor on Apr 12, 2019}}

3. def. Koyomi Matsushima at ONE: Dawn of Heroes on Aug 2, 2019}}

|{{flagicon|USA}} Thanh Le

|align=center |ONE: Inside the Matrix
{{small|Kallang, Singapore}}

|align=center |Oct 30, 2020

|align=center |{{age in days|2020|10|30|2022|8|26|show unit=full}}

|{{flagicon|CHN}} Tang Kai

|align=center |ONE 160
{{small|Kallang, Singapore}}

|align=center |Aug 26, 2022

|align=center |{{age in days|2022|08|26|show unit=full}}
(incumbent)

{{small|1. def. Interim champion Thanh Le at ONE 166 on Mar 1, 2024}}

—

|{{flagicon|USA}} Thanh Le
{{nowrap|{{small|def. Ilya Freymanov for interim title}}}}

|align=center |ONE Fight Night 15
{{small|Bangkok, Thailand}}

|align=center |Oct 7, 2023

|align=center |—

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Superbon Singha Mawynn}}
{{small|def. Giorgio Petrosyan}}

|align=center |{{nowrap|ONE: First Strike}}
{{small|Kallang, Singapore}}

|align=center |Oct 15, 2021

|align=center |{{age in days|2021|10|15|2023|1|14|show unit=full}}

|{{nowrap|{{small|1. def. Marat Grigorian on ONE: X at Mar 26, 2022}}}}

|{{flagicon|BLR}} Chingiz Allazov

|align=center |ONE Fight Night 6
{{small|Bangkok, Thailand}}

|align=center |Jan 14, 2023

|align=center |{{age in days|2023|01|14|2024|8|31|show unit=full}}

{{small|{{nowrap|1. def. Marat Grigorian at ONE Fight Night 13 on Aug 5, 2023}}}}

—

|{{flagicon|THA}} Superbon Singha Mawynn
{{nowrap|{{small|def. Marat Grigorian for interim title}}}}

|align=center |ONE Friday Fights 58
{{small|Bangkok, Thailand}}

|align=center |Apr 5, 2024

| align=center |—

colspan=6 align=center |''Allazov vacated the title on August 31, 2024, when he was released from his contract.{{Cite web |date=2024-08-26 |title=Exclusive: Chingiz Allazov to Vacate Kickboxing World Title: "I'm done fighting in ONE Championship"

|url=https://www.lowkickmma.com/chingiz-allazov-vacate-kickboxing-title-in-one/ |access-date=2025-01-05 |website=www.lowkickmma.com |language=en-US}} Interim champion Superbon was officially promoted to undisputed champion on January 6, 2025.''{{Cite web |date=2025-01-06 |title=ONE Championship: Chingiz Allazov stripped of title, Superbon elevated to featherweight kickboxing champion

|url=https://www.bangkokpost.com/sports/2934030/one-championship-chingiz-allazov-stripped-of-title-superbon-elevated-to-featherweight-kickboxing-champion |access-date=2025-01-06 |website=Bangkok Post |language=en}}

|{{nowrap|{{flagicon|THA}} Superbon Singha Mawynn {{small|(2)}}}}
{{small|promoted to undisputed champion}}

|align=center |–

|align=center |Jan 6, 2025

|align=center |{{age in days|2025|01|06|show unit=full}}
(incumbent)

–

|{{flagicon|JPN}} Masaaki Noiri
{{small|{{nowrap|def. Tawanchai P.K.Saenchai for interim title}}}}

| align=center|ONE 172
{{small|Saitama, Japan}}

| align=center| Mar 23, 2025

| align=center| {{age in days|2025|3|22||show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Petchmorakot Petchyindee}}
{{nowrap|{{small|def. Pongsiri P.K.Saenchai}}}}

|align=center |{{nowrap|ONE: Warrior's Code}}
{{small|Jakarta, Indonesia}}

|align=center |Feb 7, 2020

|align=center |{{age in days|2020|2|7|2022|9|29|show unit=full}}

{{small|1. def. Yodsanklai Fairtex at ONE: No Surrender on Jul 31, 2020

{{nowrap|2. def. Magnus Andersson at ONE: A New Breed 3 on Sep 18, 2020}}

3. def. Jimmy Vienot at ONE 157 on May 20, 2022}}

|{{flagicon|THA}} Tawanchai P.K.Saenchai

|align=center |{{nowrap|ONE 161}}
{{small|Kallang, Singapore}}

|align=center |Sep 29, 2022

|align=center |{{age in days|2022|09|29|show unit=full}}
(incumbent)

{{small|1. def. Jamal Yusupov at ONE Fight Night 7 on Feb 25, 2023

{{nowrap|2. def. Superbon Singha Mawynn at ONE Friday Fights 46 on Dec 22, 2023}}}}

{{small|4. def. Superbon Singha Mawynn at ONE 170 on Jan 24, 2025}}

= Bantamweight World Championship =

::Weight limit: {{convert|145|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|KOR}} Kim Soo-chul {{small\|def. Leandro Issa}} \|align=center \|ONE FC: Rise of Kings {{small\|Kallang, Singapore}} \|align=center \|Oct 6, 2012 \|align=center \|{{age in days\|2012\|10\|6\|2013\|10\|18\|show unit=full}} \|
— \| {{flagicon\|BRA}} Bibiano Fernandes {{nowrap\|{{small\|def. Koetsu Okazaki for interim title}}}} \|align=center \|ONE FC: Rise to Power {{small\|Pasay, Philippines}} \|align=center \|May 31, 2013 \|align=center \|— \|
2 \|{{flagicon\|Brazil}} Bibiano Fernandes \|align=center \|{{nowrap\|ONE FC: Total Domination }}{{small\|{{nowrap\|Kallang, Singapore}}}} \|align=center \|Oct 18, 2013 \|align=center \|{{age in days\|2013\|10\|18\|2018\|11\|9\|show unit=full}} \| {{small\|1. def. Masakatsu Ueda at ONE FC: Rise of Heroes on May 2, 2014 2. def. Kim Dae-hwan at ONE FC: Warrior's Way on Dec 5, 2014 3. def. Toni Tauru at ONE: Kingdom of Warriors on Jul 18, 2015 {{nowrap\|4. def. Kevin Belingon at ONE: Dynasty of Champions (Changsha) on Jan 23, 2016}} 5. def. Reece McLaren at ONE: Age of Domination on Dec 2, 2016 6. def. Andrew Leone at ONE: Kings & Conquerors on Aug 5, 2017 7. def. Martin Nguyen at ONE: Iron Will on Mar 24, 2018}}
— \| {{flagicon\|PHI}} Kevin Belingon {{nowrap\|{{small\|def. Martin Nguyen for interim title}}}} \|align=center \|ONE: Reign of Kings {{small\|Pasay, Philippines}} \|align=center \|Jul 27, 2018 \|align=center \|— \|
3 \|{{flagicon\|PHI}} Kevin Belingon \|align=center \|ONE: Heart of the Lion {{small\|Kallang, Singapore}} \|align=center \|Nov 9, 2018 \|align=center \|{{age in days\|2018\|11\|9\|2019\|3\|31\|show unit=full}} \|
4 \|{{flagicon\|BRA}} Bibiano Fernandes {{small\|(2)}} \|align=center \|ONE: A New Era {{small\|Tokyo, Japan}} \|align=center \|Mar 31, 2019 \|align=center \|{{age in days\|2019\|3\|31\|2022\|3\|11\|show unit=full}} \| {{small\|1. def. Kevin Belingon at ONE: Century − Part 2 on Oct 13, 2019}}
5 \|{{flagicon\|BRA}} John Lineker \|align=center \|ONE: Lights Out {{small\|Kallang, Singapore}} \|align=center \|Mar 11, 2022 \|align=center \|{{age in days\|2022\|3\|11\|2022\|10\|20\|show unit=full}} \|
colspan=6 align=center \|Lineker was stripped of the title on October 20, 2022, after failing to make weight for his title defense against Fabrício Andrade at ONE on Prime Video 3.{{cite web\|title=John Lineker stripped of title after missing weight for ONE on Prime Video 3\|url=https://mmajunkie.usatoday.com/2022/10/one-on-prime-video-3-john-lineker-stripped-misses-weight\|website=MMA Junkie\|access-date=20 October 2022\|date=20 October 2022}}
6 \|{{flagicon\|BRA}} Fabrício Andrade {{small\|def. John Lineker}} \|align=center \|ONE Fight Night 7 {{small\|Bangkok, Thailand}} \|align=center \|Feb 25, 2023 \|align=center \|{{age in days\|2023\|02\|25\|show unit=full}} (incumbent) \| {{small\|1. def. Kwon Won-il at ONE 170 on Jan 24, 2025}}
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|RUS}} Alaverdi Ramazanov {{small\|def. Zhang Chenglong}} \|align=center \|{{nowrap\|ONE: Mark of Greatness}} {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Dec 6, 2019 \|align=center \|{{age in days\|2019\|12\|6\|2021\|1\|22\|show unit=full}} \|
2 \|{{nowrap\|{{flagicon\|THA}} Capitan Petchyindee}} \|align=center \|ONE: Unbreakable {{small\|Kallang, Singapore}} \|align=center \|Jan 22, 2021 \|align=center \|{{age in days\|2021\|1\|22\|2022\|3\|26\|show unit=full}} \| {{small\|{{nowrap\|1. def. Mehdi Zatout at ONE: Revolution on Sep 24, 2021}}}}
3 \|{{flagicon\|JPN}} Hiroki Akimoto \|align=center \|ONE: X {{small\|Kallang, Singapore}} \|align=center \|Mar 26, 2022 \|align=center \|{{age in days\|2022\|3\|26\|2022\|11\|19\|show unit=full}} \|
4 \|{{flagicon\|THA}} Petchtanong Petchfergus \|align=center \|ONE 163 {{small\|Kallang, Singapore}} \|align=center \|Nov 19, 2022 \|align=center \|{{age in days\|2022\|11\|19\|2023\|07\|26\|show unit=full}} \|
colspan=6 align=center \|Petchtanong was stripped of the title on July 26, 2023, due to tested positive for both metenolone and noldenone, which is a banned substance according to International Doping Tests & Management.{{Cite web \|date=2023-07-26 \|title=Petchtanong popped for PEDs, stripped of title \|url=https://asianmma.com/petchtanong-popped-for-peds-stripped-of-title/ \|access-date=2023-07-26 \|website=Asian MMA \|language=en-US}}
5 \|{{nowrap\|{{flagicon\|ENG}} Jonathan Haggerty}} {{small\|def. Fabrício Andrade}} \|align=center \|{{nowrap\|ONE Fight Night 16}} {{small\|Bangkok, Thailand}} \|align=center \|Nov 4, 2023 \|align=center \|{{age in days\|2023\|11\|04\|show unit=full}} (incumbent) \|1. def Wei Rui at ONE 171: Qatar on Feb 20, 2025
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Nong-O Gaiyanghadao}} {{small\|def. Han Zihao}} \|align=center \|{{nowrap\|ONE: Clash of Legends}} {{small\|Bangkok, Thailand}} \|align=center \|Feb 16, 2019 \|align=center \|{{age in days\|2019\|02\|16\|2023\|04\|22\|show unit=full}} \| {{small\|1. def. Hiroaki Suzuki at ONE: Warriors of Light on May 10, 2019 2. def. Brice Delval at ONE: Immortal Triumph on Sep 6, 2019 3. def. Saemapetch Fairtex at ONE: Edge Of Greatness on Nov 22, 2019 4. def. Rodlek P.K. Saenchai at ONE: Collision Course on Dec 18, 2020 5. def. Felipe Lobo at ONE: X on Mar 26, 2022 6. def. Liam Harrison at ONE on Prime Video 1 on Aug 27, 2022 7. def. Alaverdi Ramazanov at ONE Friday Fights 1 on Jan 20, 2023}}
2 \|{{nowrap\|{{flagicon\|ENG}} Jonathan Haggerty}} \|align=center \|{{nowrap\|ONE Fight Night 9}} {{small\|Bangkok, Thailand}} \|align=center \|Apr 22, 2023 \|align=center \|503 days \| {{small\|1. def. Felipe Lobo at ONE Fight Night 19 on Feb 17, 2024}}
3 \|{{flagicon\|THA}} Superlek Kiatmuu9 \|align=center \|{{nowrap\|ONE 168}} {{small\|Denver, CO, U.S.}} \|align=center \|Sep 6, 2024 \|align=center \|183 days \|
– \|{{flagicon\|THA}} Nabil Anane {{small\|def. Nico Carrillo for interim title}} \|align=center \|ONE 170 {{small\|Bangkok, Thailand}} \|align=center \|Jan 24, 2025 \|align=center \|{{age in days\|2025\|01\|24\|show unit=full}} (incumbent) \|
colspan=6 align=center \|Superlek was stripped of the title on March 22, 2025, after failing to hydration test for his title unification bout against Nabil Anane at ONE 172.

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|KOR}} Kim Soo-chul
{{small|def. Leandro Issa}}

|align=center |ONE FC: Rise of Kings
{{small|Kallang, Singapore}}

|align=center |Oct 6, 2012

|align=center |{{age in days|2012|10|6|2013|10|18|show unit=full}}

—

| {{flagicon|BRA}} Bibiano Fernandes
{{nowrap|{{small|def. Koetsu Okazaki for interim title}}}}

|align=center |ONE FC: Rise to Power
{{small|Pasay, Philippines}}

|align=center |May 31, 2013

|align=center |—

|{{flagicon|Brazil}} Bibiano Fernandes

|align=center |{{nowrap|ONE FC: Total Domination
}}{{small|{{nowrap|Kallang, Singapore}}}}

|align=center |Oct 18, 2013

|align=center |{{age in days|2013|10|18|2018|11|9|show unit=full}}

{{small|1. def. Masakatsu Ueda at ONE FC: Rise of Heroes on May 2, 2014

2. def. Kim Dae-hwan at ONE FC: Warrior's Way on Dec 5, 2014

3. def. Toni Tauru at ONE: Kingdom of Warriors on Jul 18, 2015

{{nowrap|4. def. Kevin Belingon at ONE: Dynasty of Champions (Changsha) on Jan 23, 2016}}

5. def. Reece McLaren at ONE: Age of Domination on Dec 2, 2016

6. def. Andrew Leone at ONE: Kings & Conquerors on Aug 5, 2017

7. def. Martin Nguyen at ONE: Iron Will on Mar 24, 2018}}

—

| {{flagicon|PHI}} Kevin Belingon
{{nowrap|{{small|def. Martin Nguyen for interim title}}}}

|align=center |ONE: Reign of Kings
{{small|Pasay, Philippines}}

|align=center |Jul 27, 2018

|align=center |—

|{{flagicon|PHI}} Kevin Belingon

|align=center |ONE: Heart of the Lion
{{small|Kallang, Singapore}}

|align=center |Nov 9, 2018

|align=center |{{age in days|2018|11|9|2019|3|31|show unit=full}}

|{{flagicon|BRA}} Bibiano Fernandes {{small|(2)}}

|align=center |ONE: A New Era
{{small|Tokyo, Japan}}

|align=center |Mar 31, 2019

|align=center |{{age in days|2019|3|31|2022|3|11|show unit=full}}

{{small|1. def. Kevin Belingon at ONE: Century − Part 2 on Oct 13, 2019}}

|{{flagicon|BRA}} John Lineker

|align=center |ONE: Lights Out
{{small|Kallang, Singapore}}

|align=center |Mar 11, 2022

|align=center |{{age in days|2022|3|11|2022|10|20|show unit=full}}

colspan=6 align=center |Lineker was stripped of the title on October 20, 2022, after failing to make weight for his title defense against Fabrício Andrade at ONE on Prime Video 3.{{cite web|title=John Lineker stripped of title after missing weight for ONE on Prime Video 3|url=https://mmajunkie.usatoday.com/2022/10/one-on-prime-video-3-john-lineker-stripped-misses-weight|website=MMA Junkie|access-date=20 October 2022|date=20 October 2022}}

|{{flagicon|BRA}} Fabrício Andrade
{{small|def. John Lineker}}

|align=center |ONE Fight Night 7
{{small|Bangkok, Thailand}}

|align=center |Feb 25, 2023

|align=center |{{age in days|2023|02|25|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|RUS}} Alaverdi Ramazanov
{{small|def. Zhang Chenglong}}

|align=center |{{nowrap|ONE: Mark of Greatness}}
{{small|Kuala Lumpur, Malaysia}}

|align=center |Dec 6, 2019

|align=center |{{age in days|2019|12|6|2021|1|22|show unit=full}}

|{{nowrap|{{flagicon|THA}} Capitan Petchyindee}}

|align=center |ONE: Unbreakable
{{small|Kallang, Singapore}}

|align=center |Jan 22, 2021

|align=center |{{age in days|2021|1|22|2022|3|26|show unit=full}}

{{small|{{nowrap|1. def. Mehdi Zatout at ONE: Revolution on Sep 24, 2021}}}}

|{{flagicon|JPN}} Hiroki Akimoto

|align=center |ONE: X
{{small|Kallang, Singapore}}

|align=center |Mar 26, 2022

|align=center |{{age in days|2022|3|26|2022|11|19|show unit=full}}

|{{flagicon|THA}} Petchtanong Petchfergus

|align=center |ONE 163
{{small|Kallang, Singapore}}

|align=center |Nov 19, 2022

|align=center |{{age in days|2022|11|19|2023|07|26|show unit=full}}

colspan=6 align=center |Petchtanong was stripped of the title on July 26, 2023, due to tested positive for both metenolone and noldenone, which is a banned substance according to International Doping Tests & Management.{{Cite web |date=2023-07-26 |title=Petchtanong popped for PEDs, stripped of title |url=https://asianmma.com/petchtanong-popped-for-peds-stripped-of-title/ |access-date=2023-07-26 |website=Asian MMA |language=en-US}}

|{{nowrap|{{flagicon|ENG}} Jonathan Haggerty}}
{{small|def. Fabrício Andrade}}

|align=center |{{nowrap|ONE Fight Night 16}}
{{small|Bangkok, Thailand}}

|align=center |Nov 4, 2023

|align=center |{{age in days|2023|11|04|show unit=full}}
(incumbent)

|1. def Wei Rui at ONE 171: Qatar on Feb 20, 2025

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Nong-O Gaiyanghadao}}
{{small|def. Han Zihao}}

|align=center |{{nowrap|ONE: Clash of Legends}}
{{small|Bangkok, Thailand}}

|align=center |Feb 16, 2019

|align=center |{{age in days|2019|02|16|2023|04|22|show unit=full}}

{{small|1. def. Hiroaki Suzuki at ONE: Warriors of Light on May 10, 2019

2. def. Brice Delval at ONE: Immortal Triumph on Sep 6, 2019

3. def. Saemapetch Fairtex at ONE: Edge Of Greatness on Nov 22, 2019
4. def. Rodlek P.K. Saenchai at ONE: Collision Course on Dec 18, 2020

5. def. Felipe Lobo at ONE: X on Mar 26, 2022

6. def. Liam Harrison at ONE on Prime Video 1 on Aug 27, 2022

7. def. Alaverdi Ramazanov at ONE Friday Fights 1 on Jan 20, 2023}}

|{{nowrap|{{flagicon|ENG}} Jonathan Haggerty}}

|align=center |{{nowrap|ONE Fight Night 9}}
{{small|Bangkok, Thailand}}

|align=center |Apr 22, 2023

|align=center |503 days

{{small|1. def. Felipe Lobo at ONE Fight Night 19 on Feb 17, 2024}}

|{{flagicon|THA}} Superlek Kiatmuu9

|align=center |{{nowrap|ONE 168}}
{{small|Denver, CO, U.S.}}

|align=center |Sep 6, 2024

|align=center |183 days

–

|{{flagicon|THA}} Nabil Anane
{{small|def. Nico Carrillo for interim title}}

|align=center |ONE 170
{{small|Bangkok, Thailand}}

|align=center |Jan 24, 2025

|align=center |{{age in days|2025|01|24|show unit=full}}
(incumbent)

colspan=6 align=center |Superlek was stripped of the title on March 22, 2025, after failing to hydration test for his title unification bout against Nabil Anane at ONE 172.

= Flyweight World Championship =

::Weight limit: {{convert|135|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|BRA}} Adriano Moraes {{small\|def. Geje Eustaquio}} \|align=center \|ONE: Rise of the Kingdom {{small\|Phnom Penh, Cambodia}} \|align=center \|Sep 12, 2014 \|align=center \|{{age in days\|2014\|9\|12\|2015\|11\|21\|show unit=full}} \| {{nowrap\|{{small\|1. def. {{abbr\|Riku Shibuya\|formerly known as Asuka Mikami}} at ONE: Age of Champions on Mar 13, 2015}}}}
2 \|{{flagicon\|KAZ}} Kairat Akhmetov \|align=center \|{{nowrap\|ONE: Dynasty of Champions 3}} {{small\|Beijing, China}} \|align=center \|Nov 21, 2015 \|align=center \|{{age in days\|2015\|11\|21\|2017\|8\|5\|show unit=full}} \|
— \|{{flagicon\|BRA}} Adriano Moraes {{small\|def. Tilek Batyrov for interim title}} \|align=center \|ONE: Heroes of the World {{small\|Macau, SAR, China}} \|align=center \|Aug 13, 2016 \|align=center \|— \|
3 \|{{flagicon\|BRA}} Adriano Moraes {{small\|(2)}} \|align=center \|ONE: Kings & Conquerors {{small\|Macau, SAR, China}} \|align=center \|Aug 5, 2017 \|align=center \|{{age in days\|2017\|8\|5\|2018\|6\|23\|show unit=full}} (757 days) \| {{small\|1. def. Danny Kingad at ONE: Legends of the World on Nov 10, 2017}}
— \|{{flagicon\|PHI}} Geje Eustaquio {{nowrap\|{{small\|def. Kairat Akhmetov for interim title}}}} \|align=center \| ONE: Global Superheroes {{small\|Pasay, Philippines}} \|align=center \|Jan 26, 2018 \|align=center \|— \|
4 \|{{flagicon\|PHI}} Geje Eustaquio \|align=center \|ONE: Pinnacle of Power {{small\|Beijing, China}} \|align=center \|Jun 23, 2018 \|align=center \|{{age in days\|2018\|6\|23\|2019\|1\|25\|show unit=full}} \|
5 \|{{flagicon\|BRA}} Adriano Moraes {{small\|(3)}} \|align=center \|ONE: Hero's Ascent {{small\|Pasay, Philippines}} \|align=center \|Jan 25, 2019 \|align=center \|{{age in days\|2019\|1\|25\|2022\|8\|27\|show unit=full}} (2067 days) \| {{small\|1. def. Demetrious Johnson at ONE on TNT 1 on Apr 7, 2021 2. def. Yuya Wakamatsu at ONE: X on Mar 26, 2022}}
6 \|{{flagicon\|USA}} Demetrious Johnson \|align=center \|ONE on Prime Video 1 {{small\|Kallang, Singapore}} \|align=center \|Aug 27, 2022 \|align=center \|741 days \| {{small\|1. def. Adriano Moraes at ONE Fight Night 10 on May 5, 2023}}
colspan=8 align=center \| Johnson announced his retirement from MMA during at ONE 168 on September 6, 2024.{{Cite web \|last=Law \|first=Eddie \|date=2024-09-06 \|title=Demetrious Johnson Announces His Retirement From MMA \|url=https://cagesidepress.com/2024/09/06/demetrious-johnson-announces-his-retirement-from-mma/ \|access-date=2024-09-06 \|website=Cageside Press \|language=en-US}}
7 \|{{flagicon\|JPN}} Yuya Wakamatsu {{small\|def. Adriano Moraes}} \| align=center\|ONE 172 {{small\|Saitama, Japan}} \| align=center\| Mar 23, 2025 \| align=center\| {{age in days\|2025\|3\|23\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Petchdam Petchyindee}} {{small\|def. Elias Mahmoudi}} \|align=center \|{{nowrap\|ONE: Warriors of Light}} {{small\|Bangkok, Thailand}} \|align=center \|May 10, 2019 \|align=center \|{{age in days\|2019\|5\|10\|2019\|8\|16\|show unit=full}} \|
2 \|{{flagicon\|NED}} Ilias Ennahachi \|align=center \|ONE: Dreams of Gold {{small\|Bangkok, Thailand}} \|align=center \|Aug 16, 2019 \|align=center \|{{age in days\|2019\|8\|16\|2023\|1\|3\|show unit=full}} \|{{small\|{{nowrap\|1. def. Wang Wenfeng at ONE: Age Of Dragons on Nov 16, 2019}} 2. def. Superlek Kiatmuukao at ONE: Fists Of Fury on Feb 26, 2021}}
colspan=8 align=center \|Ennahachi vacated the belt on January 3, 2023, due to his inability to make the flyweight limit of 135 pounds while hydrated.{{Cite web\|url=https://www.onefc.com/news/ennahachi-vacates-one-flyweight-kickboxing-world-title-superlek-to-face-puertas-for-belt/\|title=Ennahachi Vacates ONE Flyweight Kickboxing World Title; Superlek To Face Puertas For Belt\|website=ONE Championship – The Home of Martial Arts\|date=3 January 2023 \|access-date=2023-01-03}}
3 \|{{flagicon\|THA}} Superlek Kiatmuukao {{small\|def. Daniel Puertas Gallardo}} \|align=center \|{{nowrap\|ONE Fight Night 6}} {{small\|Bangkok, Thailand}} \|align=center \|Jan 14, 2023 \|align=center \|{{age in days\|2023\|01\|14\|show unit=full}} (incumbent) \| {{small\|{{nowrap\|1. def. Danial Williams at ONE Fight Night 8 on Mar 25, 2023 2. def. Takeru Segawa at ONE 165 on Jan 28, 2024}}}}
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|THA}} Sam-A Gaiyanghadao {{small\|def. Sergio Wielzen}} \|align=center \|{{nowrap\|ONE: Unstoppable Dreams}} {{small\|Kallang, Singapore}} \|align=center \|May 18, 2018 \|align=center \|{{age in days\|2018\|5\|18\|2019\|5\|4\|show unit=full}} \|
2 \|{{flagicon\|ENG}} Jonathan Haggerty \|align=center \|ONE: For Honor {{small\|Jakarta, Indonesia}} \|align=center \|May 4, 2019 \|align=center \|{{age in days\|2019\|5\|4\|2019\|8\|2\|show unit=full}} \|
3 \|{{nowrap\|{{flagicon\|THA}} Rodtang Jitmuangnon}} \|align=center \|ONE: Dawn of Heroes {{small\|Pasay, Philippines}} \|align=center \|Aug 2, 2019 \|align=center \|1924 days \| {{small\|1. def. Walter Gonçalves at ONE: Century − Part 2 on Oct 13, 2019 {{nowrap\|2. def. Jonathan Haggerty at ONE: A New Tomorrow on Jan 10, 2020}} {{nowrap\|3. def. Petchdam Petchyindee at ONE: No Surrender on Jul 31, 2020}} 4. def. Joseph Lasiri at ONE on Prime Video 4 on Nov 19, 2022 5. def. Edgar Tabares at ONE Fight Night 10 on May 5, 2023}}
colspan=8 align=center \| Rodtang was stripped of the title on November 7, 2024, after failing to make weight for his title defense against Jacob Smith at ONE 169.{{Cite web \|last=Anderson \|first=Jay \|date=2024-11-07 \|title=Muay Thai Star Rodtang Misses Weight for ONE 169, Stripped of Title \|url=https://cagesidepress.com/2024/11/07/muay-thai-star-rodtang-misses-weight-for-one-169-stripped-of-title/ \|access-date=2024-11-07 \|website=Cageside Press \|language=en-US}}
align=left colspan="6" bgcolor="#FF7F7F"\|Submission grappling
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Mikey Musumeci {{small\|def. Cleber Souza}} \|align=center \|ONE on Prime Video 2 {{small\|Kallang, Singapore}} \|align=center \| Oct 1, 2022 \|align=center \| 705 days \| {{small\|1. def. Gantumur Bayanduuren at ONE Fight Night 6 on Jan 14, 2023}} {{small\|2. def. Osamah Almarwai at ONE Fight Night 10 on May 5, 2023}} {{small\|3. def. Jarred Brooks at ONE Fight Night 13 on August 5, 2023}}
colspan=8 align=center \| Musumeci was stripped of the title on September 5, 2024, after failing to make weight for his title defense against Bebeto Oliveira at ONE 168.{{Cite web \|last=Rogers \|first=Kian \|title=Mikey Musumeci Misses Weight, Stripped Of ONE Championship Title \|url=https://jitsmagazine.com/mikey-musumeci-misses-weight-stripped-of-one-championship-title/ \|access-date=2024-09-06 \|website=Jitsmagazine}}

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|BRA}} Adriano Moraes
{{small|def. Geje Eustaquio}}

|align=center |ONE: Rise of the Kingdom
{{small|Phnom Penh, Cambodia}}

|align=center |Sep 12, 2014

|align=center |{{age in days|2014|9|12|2015|11|21|show unit=full}}

{{nowrap|{{small|1. def. {{abbr|Riku Shibuya|formerly known as Asuka Mikami}} at ONE: Age of Champions on Mar 13, 2015}}}}

|{{flagicon|KAZ}} Kairat Akhmetov

|align=center |{{nowrap|ONE: Dynasty of Champions 3}}
{{small|Beijing, China}}

|align=center |Nov 21, 2015

|align=center |{{age in days|2015|11|21|2017|8|5|show unit=full}}

—

|{{flagicon|BRA}} Adriano Moraes
{{small|def. Tilek Batyrov for interim title}}

|align=center |ONE: Heroes of the World
{{small|Macau, SAR, China}}

|align=center |Aug 13, 2016

|align=center |—

|{{flagicon|BRA}} Adriano Moraes {{small|(2)}}

|align=center |ONE: Kings & Conquerors
{{small|Macau, SAR, China}}

|align=center |Aug 5, 2017

|align=center |{{age in days|2017|8|5|2018|6|23|show unit=full}}
(757 days)

{{small|1. def. Danny Kingad at ONE: Legends of the World on Nov 10, 2017}}

—

|{{flagicon|PHI}} Geje Eustaquio
{{nowrap|{{small|def. Kairat Akhmetov for interim title}}}}

|align=center | ONE: Global Superheroes
{{small|Pasay, Philippines}}

|align=center |Jan 26, 2018

|align=center |—

|{{flagicon|PHI}} Geje Eustaquio

|align=center |ONE: Pinnacle of Power
{{small|Beijing, China}}

|align=center |Jun 23, 2018

|align=center |{{age in days|2018|6|23|2019|1|25|show unit=full}}

|{{flagicon|BRA}} Adriano Moraes {{small|(3)}}

|align=center |ONE: Hero's Ascent
{{small|Pasay, Philippines}}

|align=center |Jan 25, 2019

|align=center |{{age in days|2019|1|25|2022|8|27|show unit=full}}
(2067 days)

{{small|1. def. Demetrious Johnson at ONE on TNT 1 on Apr 7, 2021

2. def. Yuya Wakamatsu at ONE: X on Mar 26, 2022}}

|{{flagicon|USA}} Demetrious Johnson

|align=center |ONE on Prime Video 1
{{small|Kallang, Singapore}}

|align=center |Aug 27, 2022

|align=center |741 days

{{small|1. def. Adriano Moraes at ONE Fight Night 10 on May 5, 2023}}

colspan=8 align=center | Johnson announced his retirement from MMA during at ONE 168 on September 6, 2024.{{Cite web |last=Law |first=Eddie |date=2024-09-06 |title=Demetrious Johnson Announces His Retirement From MMA

|url=https://cagesidepress.com/2024/09/06/demetrious-johnson-announces-his-retirement-from-mma/ |access-date=2024-09-06 |website=Cageside Press |language=en-US}}

|{{flagicon|JPN}} Yuya Wakamatsu
{{small|def. Adriano Moraes}}

| align=center|ONE 172
{{small|Saitama, Japan}}

| align=center| Mar 23, 2025

| align=center| {{age in days|2025|3|23|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Petchdam Petchyindee}}
{{small|def. Elias Mahmoudi}}

|align=center |{{nowrap|ONE: Warriors of Light}}
{{small|Bangkok, Thailand}}

|align=center |May 10, 2019

|align=center |{{age in days|2019|5|10|2019|8|16|show unit=full}}

|{{flagicon|NED}} Ilias Ennahachi

|align=center |ONE: Dreams of Gold
{{small|Bangkok, Thailand}}

|align=center |Aug 16, 2019

|align=center |{{age in days|2019|8|16|2023|1|3|show unit=full}}

|{{small|{{nowrap|1. def. Wang Wenfeng at ONE: Age Of Dragons on Nov 16, 2019}}
2. def. Superlek Kiatmuukao at ONE: Fists Of Fury on Feb 26, 2021}}

colspan=8 align=center |Ennahachi vacated the belt on January 3, 2023, due to his inability to make the flyweight limit of 135 pounds while hydrated.{{Cite web|url=https://www.onefc.com/news/ennahachi-vacates-one-flyweight-kickboxing-world-title-superlek-to-face-puertas-for-belt/|title=Ennahachi Vacates ONE Flyweight Kickboxing World Title; Superlek To Face Puertas For Belt|website=ONE Championship – The Home of Martial Arts|date=3 January 2023 |access-date=2023-01-03}}

|{{flagicon|THA}} Superlek Kiatmuukao
{{small|def. Daniel Puertas Gallardo}}

|align=center |{{nowrap|ONE Fight Night 6}}
{{small|Bangkok, Thailand}}

|align=center |Jan 14, 2023

|align=center |{{age in days|2023|01|14|show unit=full}}
(incumbent)

{{small|{{nowrap|1. def. Danial Williams at ONE Fight Night 8 on Mar 25, 2023

2. def. Takeru Segawa at ONE 165 on Jan 28, 2024}}}}

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|THA}} Sam-A Gaiyanghadao
{{small|def. Sergio Wielzen}}

|align=center |{{nowrap|ONE: Unstoppable Dreams}}
{{small|Kallang, Singapore}}

|align=center |May 18, 2018

|align=center |{{age in days|2018|5|18|2019|5|4|show unit=full}}

|{{flagicon|ENG}} Jonathan Haggerty

|align=center |ONE: For Honor
{{small|Jakarta, Indonesia}}

|align=center |May 4, 2019

|align=center |{{age in days|2019|5|4|2019|8|2|show unit=full}}

|{{nowrap|{{flagicon|THA}} Rodtang Jitmuangnon}}

|align=center |ONE: Dawn of Heroes
{{small|Pasay, Philippines}}

|align=center |Aug 2, 2019

|align=center |1924 days

{{small|1. def. Walter Gonçalves at ONE: Century − Part 2 on Oct 13, 2019

{{nowrap|2. def. Jonathan Haggerty at ONE: A New Tomorrow on Jan 10, 2020}}

{{nowrap|3. def. Petchdam Petchyindee at ONE: No Surrender on Jul 31, 2020}}

4. def. Joseph Lasiri at ONE on Prime Video 4 on Nov 19, 2022

5. def. Edgar Tabares at ONE Fight Night 10 on May 5, 2023}}

colspan=8 align=center | Rodtang was stripped of the title on November 7, 2024, after failing to make weight for his title defense against Jacob Smith at ONE 169.{{Cite web |last=Anderson |first=Jay |date=2024-11-07 |title=Muay Thai Star Rodtang Misses Weight for ONE 169, Stripped of Title

|url=https://cagesidepress.com/2024/11/07/muay-thai-star-rodtang-misses-weight-for-one-169-stripped-of-title/ |access-date=2024-11-07 |website=Cageside Press |language=en-US}}

align=left colspan="6" bgcolor="#FF7F7F"|Submission grappling

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Mikey Musumeci
{{small|def. Cleber Souza}}

|align=center |ONE on Prime Video 2
{{small|Kallang, Singapore}}

|align=center | Oct 1, 2022

|align=center | 705 days

{{small|1. def. Gantumur Bayanduuren at ONE Fight Night 6 on Jan 14, 2023}}

{{small|2. def. Osamah Almarwai at ONE Fight Night 10 on May 5, 2023}}

{{small|3. def. Jarred Brooks at ONE Fight Night 13 on August 5, 2023}}

colspan=8 align=center | Musumeci was stripped of the title on September 5, 2024, after failing to make weight for his title defense against Bebeto Oliveira at ONE 168.{{Cite web |last=Rogers |first=Kian |title=Mikey Musumeci Misses Weight, Stripped Of ONE Championship Title

|url=https://jitsmagazine.com/mikey-musumeci-misses-weight-stripped-of-one-championship-title/ |access-date=2024-09-06 |website=Jitsmagazine}}

= Strawweight World Championship =

::Weight limit: {{convert|125|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Dejdamrong Sor Amnuaysirichoke}} {{small\|def. Roy Doliguez}} \|align=center \|ONE: Warrior's Quest {{small\|Kallang, Singapore}} \|align=center \|May 22, 2015 \|align=center \|{{age in days\|2015\|5\|22\|2016\|5\|27\|show unit=full}} \|
2 \|{{flagicon\|JPN}} Yoshitaka Naito \|align=center \|{{nowrap\|ONE: Kingdom of Champions}} {{small\|Bangkok, Thailand}} \|align=center \|May 27, 2016 \|align=center \|{{age in days\|2016\|5\|27\|2017\|12\|9\|show unit=full}} \| {{nowrap\|{{small\|1. def. Joshua Pacio at ONE: State of Warriors on Oct 7, 2016}}}}
3 \|{{flagicon\|BRA}} Alex Silva \|align=center \|ONE: Warriors of the World {{small\|Bangkok, Thailand}} \|align=center \|Dec 9, 2017 \|align=center \|{{age in days\|2017\|12\|9\|2018\|5\|12\|show unit=full}} \|
4 \|{{flagicon\|JPN}} Yoshitaka Naito {{small\|(2)}} \|align=center \|ONE: Grits And Glory {{small\|Jakarta, Indonesia}} \|align=center \|May 12, 2018 \|align=center \|{{age in days\|2018\|5\|12\|2018\|9\|22\|show unit=full}} (694 days) \|
5 \|{{flagicon\|PHI}} Joshua Pacio \|align=center \|ONE: Conquest of Heroes {{small\|Jakarta, Indonesia}} \|align=center \|Sep 22, 2018 \|align=center \|{{age in days\|2018\|9\|22\|2019\|1\|19\|show unit=full}} \|
6 \|{{flagicon\|JPN}} Yosuke Saruta \|align=center \|ONE: Eternal Glory {{small\|Jakarta, Indonesia}} \|align=center \|Jan 19, 2019 \|align=center \|{{age in days\|2019\|1\|19\|2019\|4\|12\|show unit=full}} \|
7 \|{{flagicon\|PHI}} Joshua Pacio {{small\|(2)}} \|align=center \|{{nowrap\|ONE: Roots of Honor}} {{small\|Pasay, Philippines}} \|align=center \|Apr 12, 2019 \|align=center \|{{age in days\|2019\|4\|12\|2022\|12\|3\|show unit=full}} (1450 days) \| {{small\|1. def. Rene Catalan at ONE: Masters Of Fate on Nov 8, 2019 2. def. Alex Silva at ONE: Fire & Fury on Jan 31, 2020 {{nowrap\|3. def. Yosuke Saruta at ONE: Revolution on Sep 24, 2021}}}}
8 \|{{flagicon\|USA}} Jarred Brooks \|align=center \|{{nowrap\|ONE 164}} {{small\|Pasay, Philippines}} \|align=center \|Dec 3, 2022 \|align=center \|{{age in days\|2022\|12\|03\|2024\|3\|1\|show unit=full}} \|
9 \|{{flagicon\|PHI}} Joshua Pacio {{small\|(3)}} \|align=center \|ONE 166 {{small\|Lusail, Qatar}} \|align=center \|Mar 1, 2024 \|align=center \|{{age in days\|2024\|03\|01\|show unit=full}} (incumbent) \|1. def. Interim champion Jarred Brooks at ONE 171: Qatar on Feb 20, 2025
— \|{{flagicon\|USA}} Jarred Brooks {{nowrap\|{{small\|def. Gustavo Balart for interim title}}}} \|align=center \| ONE Fight Night 24 {{small\|Bangkok, Thailand}} \|align=center \|Aug 3, 2024 \|align=center \|— \|
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|THA}} Sam-A Gaiyanghadao}} {{small\|def. Wang Junguang}} \|align=center \|{{nowrap\|ONE: Mark Of Greatness}} {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Dec 6, 2019 \|align=center \|{{age in days\|2019\|12\|6\|2022\|2\|19\|show unit=full}} \|
colspan=6 align=center \|''Sam-A vacated the title on February 19, 2022 due to retirement.{{cite web\|title=ONE Championship celebrates Sam-A Gaiyanghadao's glorious career as Thai fighter announces retirement \|url=https://www.sportskeeda.com/mma/news-sam-a-gaiyanghadao-retires-professional-competition \|website=www.sportskeeda.com \|access-date=21 February 2022}}''
2 \|{{flagicon\|ITA}} Jonathan Di Bella {{small\|def. Zhang Peimian}} \|align=center \|ONE 162 {{small\|Kuala Lumpur, Malaysia}} \|align=center \|Oct 21, 2022 \|align=center \|{{age in days\|2022\|10\|21\|2024\|04\|04\|show unit=full}} \| {{small\|1. def. Danial Williams at ONE Fight Night 15 on Oct 7, 2023}}
colspan=6 align=center \|Di Bella was stripped of the title on April 4, 2024, after failing to make hydration for his title defense against Prajanchai P.K.Saenchai at ONE Friday Fights 58.{{cite web \|last1=Yomjinda \|first1=Woradon \|title=Di Bella vs. Prajanchai Set for April 5 \|url=https://beyondkick.com/news/di-bella-prajanchai/ \|website=Beyond Kickboxing - The Home of Kickboxing \|access-date=2 March 2024 \|language=en}} He was stripped of his title after failing to meet the required hydration levels at the weigh-ins.{{cite web \|last1=Strobel \|first1=Kevin \|title=Jonathan Di Bella vs. Prajanchai Has Been Cancelled \|url=https://beyondkick.com/news/breaking-jonathan-di-bella-hospitalized-and-stripped-of-title-after-failing-hydration-test-strawweight-title-fight-cancelled/ \|website=Beyond Kickboxing - The Home of Kickboxing \|access-date=5 April 2024 \|language=en}}
3 \|{{nowrap\|{{flagicon\|THA}} Prajanchai P.K.Saenchai}} {{small\|def. Jonathan Di Bella}} \|align=center \|ONE Friday Fights 68 {{small\|Bangkok, Thailand}} \|align=center\|Jun 28, 2024 \|align=center\|{{age in days\|2024\|6\|28\|\|show unit=full}} (incumbent) \|
— \| {{flagicon\|ITA}} Jonathan Di Bella {{nowrap\|{{small\|def. Sam-A Gaiyanghadao for interim title}}}} \| align=center\|ONE 172 {{small\|Saitama, Japan}} \| align=center\| Mar 23, 2025 \| align=center\| {{age in days\|2025\|3\|22\|\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|THA}} Sam-A Gaiyanghadao {{small\|def. Rocky Ogden}} \|align=center \|{{nowrap\|ONE: King of the Jungle}} {{small\|Kallang, Singapore}} \|align=center \|Feb 28, 2020 \|align=center \|{{age in days\|2020\|2\|28\|2021\|7\|30\|show unit=full}} \| {{nowrap\|{{small\|1. def. Josh Tonna at ONE: Reign of Dynasties on Oct 9, 2020}}}}
2 \|{{nowrap\|{{flagicon\|THA}} Prajanchai P.K.Saenchai}} \|align=center \|ONE: Battleground {{small\|Kallang, Singapore}} \|align=center\|Jul 30, 2021 \|align=center\|{{age in days\|2021\|7\|30\|2022\|5\|20\|show unit=full}} \|
3 \|{{flagicon\|ITA}} Joseph Lasiri \|align=center \|ONE 157 {{small\|Kallang, Singapore}} \|align=center \|May 20, 2022 \|align=center \|{{age in days\|2022\|05\|20\|2023\|12\|22\|\|show unit=full}} \|
— \| {{flagicon\|THA}} Prajanchai P.K.Saenchai {{nowrap\|{{small\|def. Sam-A Gaiyanghadao for interim title}}}} \| align=center\|ONE Friday Fights 22 {{small\|Bangkok, Thailand}} \| align=center\| Jun 23, 2023 \| align=center\| — \|
4 \| {{flagicon\|THA}} Prajanchai P.K.Saenchai {{small\|(2)}} \| align=center\|ONE Friday Fights 46 {{small\|Bangkok, Thailand}} \| align=center\| Dec 22, 2023 \| align=center\|{{age in days\|2023\|12\|22\|\|show unit=full}} (incumbent) \| 1. def. Ellis Barboza at ONE Fight Night 28 on Feb 7, 2025

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Dejdamrong Sor Amnuaysirichoke}}
{{small|def. Roy Doliguez}}

|align=center |ONE: Warrior's Quest
{{small|Kallang, Singapore}}

|align=center |May 22, 2015

|align=center |{{age in days|2015|5|22|2016|5|27|show unit=full}}

|{{flagicon|JPN}} Yoshitaka Naito

|align=center |{{nowrap|ONE: Kingdom of Champions}}
{{small|Bangkok, Thailand}}

|align=center |May 27, 2016

|align=center |{{age in days|2016|5|27|2017|12|9|show unit=full}}

{{nowrap|{{small|1. def. Joshua Pacio at ONE: State of Warriors on Oct 7, 2016}}}}

|{{flagicon|BRA}} Alex Silva

|align=center |ONE: Warriors of the World
{{small|Bangkok, Thailand}}

|align=center |Dec 9, 2017

|align=center |{{age in days|2017|12|9|2018|5|12|show unit=full}}

|{{flagicon|JPN}} Yoshitaka Naito {{small|(2)}}

|align=center |ONE: Grits And Glory
{{small|Jakarta, Indonesia}}

|align=center |May 12, 2018

|align=center |{{age in days|2018|5|12|2018|9|22|show unit=full}}
(694 days)

|{{flagicon|PHI}} Joshua Pacio

|align=center |ONE: Conquest of Heroes
{{small|Jakarta, Indonesia}}

|align=center |Sep 22, 2018

|align=center |{{age in days|2018|9|22|2019|1|19|show unit=full}}

|{{flagicon|JPN}} Yosuke Saruta

|align=center |ONE: Eternal Glory
{{small|Jakarta, Indonesia}}

|align=center |Jan 19, 2019

|align=center |{{age in days|2019|1|19|2019|4|12|show unit=full}}

|{{flagicon|PHI}} Joshua Pacio {{small|(2)}}

|align=center |{{nowrap|ONE: Roots of Honor}}
{{small|Pasay, Philippines}}

|align=center |Apr 12, 2019

|align=center |{{age in days|2019|4|12|2022|12|3|show unit=full}}
(1450 days)

{{small|1. def. Rene Catalan at ONE: Masters Of Fate on Nov 8, 2019

2. def. Alex Silva at ONE: Fire & Fury on Jan 31, 2020

{{nowrap|3. def. Yosuke Saruta at ONE: Revolution on Sep 24, 2021}}}}

|{{flagicon|USA}} Jarred Brooks

|align=center |{{nowrap|ONE 164}}
{{small|Pasay, Philippines}}

|align=center |Dec 3, 2022

|align=center |{{age in days|2022|12|03|2024|3|1|show unit=full}}

|{{flagicon|PHI}} Joshua Pacio {{small|(3)}}

|align=center |ONE 166
{{small|Lusail, Qatar}}

|align=center |Mar 1, 2024

|align=center |{{age in days|2024|03|01|show unit=full}}
(incumbent)

|1. def. Interim champion Jarred Brooks at ONE 171: Qatar on Feb 20, 2025

—

|{{flagicon|USA}} Jarred Brooks
{{nowrap|{{small|def. Gustavo Balart for interim title}}}}

|align=center | ONE Fight Night 24
{{small|Bangkok, Thailand}}

|align=center |Aug 3, 2024

|align=center |—

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|THA}} Sam-A Gaiyanghadao}}
{{small|def. Wang Junguang}}

|align=center |{{nowrap|ONE: Mark Of Greatness}}
{{small|Kuala Lumpur, Malaysia}}

|align=center |Dec 6, 2019

|align=center |{{age in days|2019|12|6|2022|2|19|show unit=full}}

colspan=6 align=center |''Sam-A vacated the title on February 19, 2022 due to retirement.{{cite web|title=ONE Championship celebrates Sam-A Gaiyanghadao's glorious career as Thai fighter announces retirement

|url=https://www.sportskeeda.com/mma/news-sam-a-gaiyanghadao-retires-professional-competition

|website=www.sportskeeda.com

|access-date=21 February 2022}}''

|{{flagicon|ITA}} Jonathan Di Bella
{{small|def. Zhang Peimian}}

|align=center |ONE 162
{{small|Kuala Lumpur, Malaysia}}

|align=center |Oct 21, 2022

|align=center |{{age in days|2022|10|21|2024|04|04|show unit=full}}

{{small|1. def. Danial Williams at ONE Fight Night 15 on Oct 7, 2023}}

colspan=6 align=center |Di Bella was stripped of the title on April 4, 2024, after failing to make hydration for his title defense against Prajanchai P.K.Saenchai at ONE Friday Fights 58.{{cite web |last1=Yomjinda |first1=Woradon |title=Di Bella vs. Prajanchai Set for April 5 |url=https://beyondkick.com/news/di-bella-prajanchai/ |website=Beyond Kickboxing - The Home of Kickboxing |access-date=2 March 2024 |language=en}} He was stripped of his title after failing to meet the required hydration levels at the weigh-ins.{{cite web |last1=Strobel |first1=Kevin |title=Jonathan Di Bella vs. Prajanchai Has Been Cancelled |url=https://beyondkick.com/news/breaking-jonathan-di-bella-hospitalized-and-stripped-of-title-after-failing-hydration-test-strawweight-title-fight-cancelled/ |website=Beyond Kickboxing - The Home of Kickboxing |access-date=5 April 2024 |language=en}}

|{{nowrap|{{flagicon|THA}} Prajanchai P.K.Saenchai}}
{{small|def. Jonathan Di Bella}}

|align=center |ONE Friday Fights 68
{{small|Bangkok, Thailand}}

|align=center|Jun 28, 2024

|align=center|{{age in days|2024|6|28||show unit=full}}
(incumbent)

—

| {{flagicon|ITA}} Jonathan Di Bella
{{nowrap|{{small|def. Sam-A Gaiyanghadao for interim title}}}}

| align=center|ONE 172
{{small|Saitama, Japan}}

| align=center| Mar 23, 2025

| align=center| {{age in days|2025|3|22||show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|THA}} Sam-A Gaiyanghadao
{{small|def. Rocky Ogden}}

|align=center |{{nowrap|ONE: King of the Jungle}}
{{small|Kallang, Singapore}}

|align=center |Feb 28, 2020

|align=center |{{age in days|2020|2|28|2021|7|30|show unit=full}}

{{nowrap|{{small|1. def. Josh Tonna at ONE: Reign of Dynasties on Oct 9, 2020}}}}

|{{nowrap|{{flagicon|THA}} Prajanchai P.K.Saenchai}}

|align=center |ONE: Battleground
{{small|Kallang, Singapore}}

|align=center|Jul 30, 2021

|align=center|{{age in days|2021|7|30|2022|5|20|show unit=full}}

|{{flagicon|ITA}} Joseph Lasiri

|align=center |ONE 157
{{small|Kallang, Singapore}}

|align=center |May 20, 2022

|align=center |{{age in days|2022|05|20|2023|12|22||show unit=full}}

—

| {{flagicon|THA}} Prajanchai P.K.Saenchai
{{nowrap|{{small|def. Sam-A Gaiyanghadao for interim title}}}}

| align=center|ONE Friday Fights 22
{{small|Bangkok, Thailand}}

| align=center| Jun 23, 2023

| align=center| —

| {{flagicon|THA}} Prajanchai P.K.Saenchai {{small|(2)}}

| align=center|ONE Friday Fights 46
{{small|Bangkok, Thailand}}

| align=center| Dec 22, 2023

| align=center|{{age in days|2023|12|22||show unit=full}}
(incumbent)

1. def. Ellis Barboza at ONE Fight Night 28 on Feb 7, 2025

Women's championship history

= Women's Strawweight World Championship =

::Weight limit: {{convert|125|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{nowrap\|{{flagicon\|CHN}} Xiong Jing Nan}} {{small\|def. Tiffany Teo}} \|align=center \| {{nowrap\|ONE: Kings of Courage}} {{small\|Jakarta, Indonesia}} \|align=center \|Jan 20, 2018 \|align=center \|{{age in days\|2018\|01\|20\|show unit=full}} (incumbent) \| {{small\|1. def. Laura Balin at ONE: Pinnacle of Power on Jun 23, 2018 {{nowrap\|2. def. Samara Santos at ONE: Beyond the Horizon on Sep 8, 2018}} 3. def. Angela Lee at ONE: A New Era on Mar 31, 2019 4. def. Tiffany Teo at ONE: Inside the Matrix on Oct 3, 2020 5. def. Michelle Nicolini at ONE: Empower on Sep 3, 2021 6. def. Ayaka Miura at ONE: Heavy Hitters on Jan 14, 2022 7. def. Angela Lee at ONE on Prime Video 2 on Oct 1, 2022}}
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
1 \|{{nowrap\|{{flagicon\|USA}} Jackie Buntan}} {{small\|def. Anissa Meksen}} \|align=center \| {{nowrap\|ONE 169}} {{small\|Bangkok, Thailand}} \|align=center \|Nov 9, 2024 \|align=center \|{{age in days\|2024\|11\|9\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
1 \|{{nowrap\|{{flagicon\|SWE}} Smilla Sundell}} {{small\|def. Jackie Buntan}} \|align=center \|ONE 156 {{small\|{{nowrap\|Kallang, Singapore}}}} \|align=center \|Apr 22, 2022 \|align=center \|{{age in days\|2022\|04\|22\|2024\|5\|2\|show unit=full}} \| {{small\|1. def. Allycia Rodrigues at ONE Fight Night 14 on Sep 30, 2023}}
colspan=6 align=center \|Sundell was stripped of the title on May 2, 2024, after failing to make weight for her title defense against Natalia Diachkova at ONE Fight Night 22.

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{nowrap|{{flagicon|CHN}} Xiong Jing Nan}}
{{small|def. Tiffany Teo}}

|align=center | {{nowrap|ONE: Kings of Courage}}
{{small|Jakarta, Indonesia}}

|align=center |Jan 20, 2018

|align=center |{{age in days|2018|01|20|show unit=full}}
(incumbent)

{{small|1. def. Laura Balin at ONE: Pinnacle of Power on Jun 23, 2018

{{nowrap|2. def. Samara Santos at ONE: Beyond the Horizon on Sep 8, 2018}}

3. def. Angela Lee at ONE: A New Era on Mar 31, 2019

4. def. Tiffany Teo at ONE: Inside the Matrix on Oct 3, 2020

5. def. Michelle Nicolini at ONE: Empower on Sep 3, 2021

6. def. Ayaka Miura at ONE: Heavy Hitters on Jan 14, 2022

7. def. Angela Lee at ONE on Prime Video 2 on Oct 1, 2022}}

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

|{{nowrap|{{flagicon|USA}} Jackie Buntan}}
{{small|def. Anissa Meksen}}

|align=center | {{nowrap|ONE 169}}
{{small|Bangkok, Thailand}}

|align=center |Nov 9, 2024

|align=center |{{age in days|2024|11|9|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

|{{nowrap|{{flagicon|SWE}} Smilla Sundell}}
{{small|def. Jackie Buntan}}

|align=center |ONE 156
{{small|{{nowrap|Kallang, Singapore}}}}

|align=center |Apr 22, 2022

|align=center |{{age in days|2022|04|22|2024|5|2|show unit=full}}

{{small|1. def. Allycia Rodrigues at ONE Fight Night 14 on Sep 30, 2023}}

colspan=6 align=center |Sundell was stripped of the title on May 2, 2024, after failing to make weight for her title defense against Natalia Diachkova at ONE Fight Night 22.

= Women's Atomweight World Championship =

::Weight limit: {{convert|115|lb|kg|1|abbr=on}}

class="wikitable" width=100% \|align=left colspan="6" bgcolor="#D0F0C0"\|Mixed martial arts (MMA)
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Angela Lee {{nowrap\|{{small\|def. Mei Yamaguchi}}}} \|align=center \| {{nowrap\|ONE: Ascent to Power}} {{small\|Kallang, Singapore}} \|align=center \|May 6, 2016 \|align=center \|{{age in days\|2016\|5\|6\|2023\|9\|30\|show unit=full}} \| {{small\|1. def. Jenny Huang at ONE: Warrior Kingdom on Mar 11, 2017}} {{small\|2. def. Istela Nunes at ONE: Dynasty of Heroes on May 26, 2017}} {{nowrap\|{{small\|3. def. Mei Yamaguchi at ONE: Unstoppable Dreams on May 18, 2018}}}} {{nowrap\|{{small\|4. def. Xiong Jing Nan at ONE: Century − Part 1 on Oct 13, 2019}}}} {{small\|5. def. Stamp Fairtex at ONE: X on Mar 26, 2022}}
colspan=6 align=center \|Lee vacated the title on September 30, 2023 due to retirement from MMA at ONE Fight Night 14.{{Cite web \|date=2023-09-30 \|title=Breaking {{!}} Angela Lee confirms retirement from MMA, vacates belt ahead of Fight Night 14 main event \|url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3236368/one-championship-angela-lee-confirms-retirement-fighting-will-vacate-belt \|access-date=2023-09-30 \|website=South China Morning Post \|language=en}}
2 \|{{flagicon\|THA}} Stamp Fairtex {{small\|def. Ham Seo-hee}} \|align=center \|ONE Fight Night 14 {{small\|Kallang, Singapore}} \|align=center \|Sep 30, 2023 \|align=center \|{{age in days\|2023\|09\|30\|show unit=full}} (incumbent) \|
— \|{{flagicon\|PHI}} Denice Zamboanga {{small\|{{nowrap\|def. Alyona Rassohyna for interim title}}}} \|align=center \|ONE Fight Night 27 {{small\|Bangkok, Thailand}} \|align=center \|Jan 11, 2025 \|align=center \|{{age in days\|2025\|01\|11\|show unit=full}} (incumbent) \|
align=left colspan="6" bgcolor="#ADD8E6"\|Kickboxing
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|Taiwan}} Chuang Kai Ting {{nowrap\|{{small\|def. Yodcherry Sityodtong}}}} \|align=center \|{{nowrap\|ONE: Battle for the Heavens}} {{small\|Guangzhou, China}} \|align=center \|Jul 7, 2018 \|align=center \|{{age in days\|2018\|7\|7\|2018\|10\|6\|show unit=full}} \|
2 \|{{Flagicon\|THA}} Stamp Fairtex \|align=center \|ONE: Kingdom of Heroes {{small\|Bangkok, Thailand}} \|align=center \|Oct 6, 2018 \|align=center \|{{age in days\|2018\|10\|6\|2020\|2\|28\|show unit=full}} \|
3 \|{{flagicon\|USA}} Janet Todd \|align=center \|ONE: King of the Jungle {{small\|Kallang, Singapore}} \|align=center \|Feb 28, 2020 \|align=center \|{{age in days\|2020\|02\|28\|2024\|3\|9\|show unit=full}} \|
— \| {{nowrap\|{{flagicon\|THA}} Phetjeeja Lukjaoporongtom}} {{nowrap\|{{small\|def. Anissa Meksen for interim title}}}} \| align=center\|ONE Friday Fights 46 {{small\|Bangkok, Thailand}} \| align=center\| Dec 22, 2023 \| align=center\| — \|
4 \|{{flagicon\|THA}} Phetjeeja Lukjaoporongtom \|align=center \|ONE Fight Night 20 {{small\|Bangkok, Thailand}} \|align=center \|Mar 9, 2024 \|align=center \|{{age in days\|2024\|3\|9\|show unit=full}} (incumbent) \|{{small\|1. def. Kana Morimoto at ONE 172 on March 23, 2025}}
align=left colspan="6" bgcolor="#FFFF99"\|Muay Thai
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|THA}} Stamp Fairtex {{small\|def. Janet Todd}} \|align=center \|{{nowrap\|ONE: Call to Greatness}} {{small\|Kallang, Singapore}} \|align=center \|Feb 22, 2019 \|align=center \|{{age in days\|2019\|2\|22\|2020\|8\|28\|show unit=full}} \| {{nowrap\|{{small\|1. def. Alma Juniku at ONE: Legendary Quest on Jun 15, 2019}}}}
2 \|{{nowrap\|{{flagicon\|BRA}} Allycia Rodrigues}} \|align=center \|ONE: A New Breed {{small\|Bangkok, Thailand}} \|align=center \|Aug 28, 2020 \|align=center \|{{age in days\|2020\|08\|28\|show unit=full}} (incumbent) \| {{small\|{{nowrap\|1. def. interim champion Janet Todd at ONE Fight Night 8 on Mar 25, 2023}} 2. def. Cristina Morales at ONE Fight Night 20 on Mar 9, 2024}} {{small\|3. def. Marie McManamon at ONE Fight Night 29 on Mar 8, 2025}}
— \|{{flagicon\|USA}} Janet Todd {{small\|{{nowrap\|def. Lara Fernandez for interim title}}}} \|align=center \|ONE 159 {{small\|Kallang, Singapore}} \|align=center \|Jul 22, 2022 \|align=center \|— \|
align=left colspan="6" bgcolor="#FF7F7F"\|Submission grappling
width=1%\|No. !width=19%\|Name !width=15%\|Event !width=17%\|Date !width=8%\|Reign !width=40%\|Defenses
1 \|{{flagicon\|USA}} Danielle Kelly {{small\|def. Jessa Khan}} \|align=center \|ONE Fight Night 14 {{small\|Kallang, Singapore}} \|align=center \| Sep 30, 2023 \|align=center \| {{age in days\|2023\|09\|30\|2024\|08\|03\|show unit=full}}
2 \|{{flagicon\|Brazil}} Mayssa Bastos \|align=center \|ONE Fight Night 24 {{small\|Bangkok, Thailand}} \|align=center \| Aug. 3, 2024 \|align=center \| {{age in days\|2024\|08\|03\|show unit=full}} (incumbent) \|1. def. Danielle Kelly at ONE Fight Night 26 on Dec 6th, 2024

class="wikitable" width=100%

|align=left colspan="6" bgcolor="#D0F0C0"|Mixed martial arts (MMA)

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Angela Lee
{{nowrap|{{small|def. Mei Yamaguchi}}}}

|align=center | {{nowrap|ONE: Ascent to Power}}
{{small|Kallang, Singapore}}

|align=center |May 6, 2016

|align=center |{{age in days|2016|5|6|2023|9|30|show unit=full}}

{{small|1. def. Jenny Huang at ONE: Warrior Kingdom on Mar 11, 2017}}

{{small|2. def. Istela Nunes at ONE: Dynasty of Heroes on May 26, 2017}}

{{nowrap|{{small|3. def. Mei Yamaguchi at ONE: Unstoppable Dreams on May 18, 2018}}}}

{{nowrap|{{small|4. def. Xiong Jing Nan at ONE: Century − Part 1 on Oct 13, 2019}}}}

colspan=6 align=center |Lee vacated the title on September 30, 2023 due to retirement from MMA at ONE Fight Night 14.{{Cite web |date=2023-09-30 |title=Breaking {{!}} Angela Lee confirms retirement from MMA, vacates belt ahead of Fight Night 14 main event |url=https://www.scmp.com/sport/martial-arts/mixed-martial-arts/article/3236368/one-championship-angela-lee-confirms-retirement-fighting-will-vacate-belt |access-date=2023-09-30 |website=South China Morning Post |language=en}}

|{{flagicon|THA}} Stamp Fairtex
{{small|def. Ham Seo-hee}}

|align=center |ONE Fight Night 14
{{small|Kallang, Singapore}}

|align=center |Sep 30, 2023

|align=center |{{age in days|2023|09|30|show unit=full}}
(incumbent)

—

|{{flagicon|PHI}} Denice Zamboanga
{{small|{{nowrap|def. Alyona Rassohyna for interim title}}}}

|align=center |ONE Fight Night 27
{{small|Bangkok, Thailand}}

|align=center |Jan 11, 2025

|align=center |{{age in days|2025|01|11|show unit=full}}
(incumbent)

align=left colspan="6" bgcolor="#ADD8E6"|Kickboxing

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|Taiwan}} Chuang Kai Ting
{{nowrap|{{small|def. Yodcherry Sityodtong}}}}

|align=center |{{nowrap|ONE: Battle for the Heavens}}
{{small|Guangzhou, China}}

|align=center |Jul 7, 2018

|align=center |{{age in days|2018|7|7|2018|10|6|show unit=full}}

|{{Flagicon|THA}} Stamp Fairtex

|align=center |ONE: Kingdom of Heroes
{{small|Bangkok, Thailand}}

|align=center |Oct 6, 2018

|align=center |{{age in days|2018|10|6|2020|2|28|show unit=full}}

|{{flagicon|USA}} Janet Todd

|align=center |ONE: King of the Jungle
{{small|Kallang, Singapore}}

|align=center |Feb 28, 2020

|align=center |{{age in days|2020|02|28|2024|3|9|show unit=full}}

—

| {{nowrap|{{flagicon|THA}} Phetjeeja Lukjaoporongtom}}
{{nowrap|{{small|def. Anissa Meksen for interim title}}}}

| align=center|ONE Friday Fights 46
{{small|Bangkok, Thailand}}

| align=center| Dec 22, 2023

| align=center| —

|{{flagicon|THA}} Phetjeeja Lukjaoporongtom

|align=center |ONE Fight Night 20
{{small|Bangkok, Thailand}}

|align=center |Mar 9, 2024

|align=center |{{age in days|2024|3|9|show unit=full}}
(incumbent)

|{{small|1. def. Kana Morimoto at ONE 172 on March 23, 2025}}

align=left colspan="6" bgcolor="#FFFF99"|Muay Thai

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|THA}} Stamp Fairtex
{{small|def. Janet Todd}}

|align=center |{{nowrap|ONE: Call to Greatness}}
{{small|Kallang, Singapore}}

|align=center |Feb 22, 2019

|align=center |{{age in days|2019|2|22|2020|8|28|show unit=full}}

{{nowrap|{{small|1. def. Alma Juniku at ONE: Legendary Quest on Jun 15, 2019}}}}

|{{nowrap|{{flagicon|BRA}} Allycia Rodrigues}}

|align=center |ONE: A New Breed
{{small|Bangkok, Thailand}}

|align=center |Aug 28, 2020

|align=center |{{age in days|2020|08|28|show unit=full}}
(incumbent)

{{small|{{nowrap|1. def. interim champion Janet Todd at ONE Fight Night 8 on Mar 25, 2023}}

2. def. Cristina Morales at ONE Fight Night 20 on Mar 9, 2024}}

{{small|3. def. Marie McManamon at ONE Fight Night 29 on Mar 8, 2025}}

—

|{{flagicon|USA}} Janet Todd
{{small|{{nowrap|def. Lara Fernandez for interim title}}}}

|align=center |ONE 159
{{small|Kallang, Singapore}}

|align=center |Jul 22, 2022

|align=center |—

align=left colspan="6" bgcolor="#FF7F7F"|Submission grappling

width=1%|No.

!width=19%|Name

!width=15%|Event

!width=17%|Date

!width=8%|Reign

!width=40%|Defenses

|{{flagicon|USA}} Danielle Kelly
{{small|def. Jessa Khan}}

|align=center |ONE Fight Night 14
{{small|Kallang, Singapore}}

|align=center | Sep 30, 2023

|align=center | {{age in days|2023|09|30|2024|08|03|show unit=full}}

|{{flagicon|Brazil}} Mayssa Bastos

|align=center |ONE Fight Night 24
{{small|Bangkok, Thailand}}

|align=center | Aug. 3, 2024

|align=center | {{age in days|2024|08|03|show unit=full}}
(incumbent)

|1. def. Danielle Kelly at ONE Fight Night 26 on Dec 6th, 2024

Tournament winners

class="wikitable" style="width:99%;"

! Event !! Date !! Division !! Winner !! Runner-up

ONE FC: Rise to Power

| May 31, 2013

| Bantamweight

| {{flagicon|JPN}} Masakatsu Ueda

| {{flagicon|PHI}} Kevin Belingon

ONE FC: Warrior Spirit

| Nov 15, 2013

| Malaysia Featherweight

| {{flagicon|MAS}} A.J. Lias Mansor

| {{flagicon|MAS}} Melvin Yeoh

ONE FC: Rise of the Kingdom

| Sep 12, 2014

| Cambodia Featherweight

| {{flagicon|CAM}} Samang Dun

| {{flagicon|CAM}} Chan Rothana

rowspan=2 |ONE FC: Dynasty of Champions

| rowspan=2| Dec 19, 2014

| Beijing Featherweight

| {{flagicon|China}} Li Kaiwen

| {{flagicon|China}} Wang Yawei

Beijing Flyweight

| {{flagicon|China}} Li Weibin

| {{flagicon|China}} Wang Wei

rowspan=2 | ONE: Dynasty of Champions 2

| rowspan=2| Jun 20, 2015

| Guangzhou Featherweight

| {{flagicon|CHN}} Huang Diyuan

| {{flagicon|CHN}} Ma Jiawen

Guangzhou Flyweight

| {{flagicon|CHN}} Wu Ze

| {{flagicon|CHN}} Yang Jianbing

rowspan=2 | ONE: Kingdom of Warriors

| rowspan=2| Jul 18, 2015

| Myanmar Featherweight

| {{flagicon|MMR}} Tha Pyay Nyo

| {{flagicon|MMR}} Myo Man Thit

Myanmar Lightweight

| {{flagicon|MMR}} Thway Thit Aung

| {{flagicon|MMR}} Saw Ba Oo

ONE: Dynasty of Champions 3

| Nov 21, 2015

| Beijing Featherweight Tournament

| {{flagicon|CHN}} Yang Sen

| {{flagicon|CHN}} Zhang Jiacai

ONE: Dynasty of Champions 4

| Jan 23, 2016

| Changsha Bantamweight

| {{flagicon|CHN}} Ma Haobin

| {{flagicon|CHN}} Huoyou Gabu

ONE: Dynasty of Champions 6

| Jul 2, 2016

| Hefei Flyweight

| {{flagicon|CHN}} Huoyou Gabu

| {{flagicon|CHN}} Li Haojie

ONE: State of Warriors

| Oct 7, 2016

| Myanmar Featherweight

| {{flagicon|MMR}} Phoe Thaw

| {{flagicon|MMR}} Saw Yan Paing

ONE: Light of a Nation

| Jun 30, 2017

| Myanmar Flyweight

| {{flagicon|MMR}} Saw Min Min

| {{flagicon|MMR}} Shwe Kyaung Thar

rowspan=2| ONE: Century – Part 1

| rowspan=3| Oct 13, 2019

| Lightweight

| {{flagicon|USA}} Christian Lee

| {{flagicon|TUR}} Saygid Guseyn Arslanaliev

Flyweight

| {{flagicon|USA}} Demetrious Johnson

| {{flagicon|PHI}} Danny Kingad

ONE: Century – Part 2

| Featherweight Kickboxing

| {{flagicon|ITA}} Giorgio Petrosyan

| {{flagicon|FRA}} Samy Sana

ONE: A New Breed

| Aug 28, 2020

| Bantamweight Muay Thai

| {{flagicon|THA}} Rodlek P.K.Saenchai

| {{flagicon|THA}} Kulabdam Sor.Jor.Piek-U-Thai

ONE: Winter Warriors

| Dec 3, 2021

| Women's Atomweight

| {{flagicon|THA}} Stamp Fairtex

| {{flagicon|IND}} Ritu Phogat

ONE: X

| Mar 26, 2022

| Featherweight Kickboxing

| {{flagicon|BLR}} Chingiz Allazov

| {{flagicon|THA}} Sitthichai Sitsongpeenong

ONE 163

| Nov 19, 2022

| Heavyweight Kickboxing

| {{flagicon|UKR}} Roman Kryklia

| {{flagicon|IRN}} Iraj Azizpour

Records

=Most wins in title bouts=

class="wikitable"
Title wins ! Champion ! Weight class ! W ! D ! NC ! L
rowspan="1"\|11 \| {{flagicon\|BRA}} Bibiano Fernandes \| align=center\| Bantamweight of MMA \| align=center\| 11 \| align=center\| 0 \| align=center\| 0 \| align=center\| 2
rowspan="1"\|9 \| {{flagicon\|SUR}} Regian Eersel \| align=center\| Lightweight of Kickboxing Lightweight of Muay Thai \| align=center\| 6 3 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 1 0
rowspan="3"\|8 \| {{flagicon\|BRA}} Adriano Moraes \| align=center\| Flyweight of MMA \| align=center\| 8 \| align=center\| 0 \| align=center\| 0 \| align=center\| 4
{{flagicon\|CHN}} Xiong Jing Nan \| align=center\| Women's Strawweight of MMA Women's Atomweight of MMA \| align=center\| 8 0 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 0 1
{{flagicon\|THA}} Nong-O Gaiyanghadao \| align=center\| Bantamweight of Muay Thai \| align=center\| 8 \| align=center\| 0 \| align=center\| 0 \| align=center\| 1
rowspan="3"\|6 \| {{flagicon\|Myanmar}} Aung La Nsang \| align=center\| Light Heavyweight of MMA Middleweight of MMA \| align=center\| 2 4 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 1 2
{{flagicon\|USA}} Angela Lee \| align=center\| Women's Strawweight of MMA Women's Atomweight of MMA \| align=center\| 0 6 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 2 0
{{flagicon\|THA}} Rodtang Jitmuangnon \| align=center\| Flyweight of Muay Thai \| align=center\| 6 \| align=center\| 0 \| align=center\| 0 \| align=center\| 0
rowspan="3"\|5 \| {{flagicon\|AUS}} Martin Nguyen \| align=center\| Lightweight of MMA Featherweight of MMA Bantamweight of MMA \| align=center\| 1 4 0 \| align=center\| 0 0 0 \| align=center\| 0 0 0 \| align=center\| 0 2 2
{{flagicon\|PHI}} Joshua Pacio \| align=center\| Strawweight of MMA \| align=center\| 5 \| align=center\| 0 \| align=center\| 0 \| align=center\| 3
{{flagicon\|USA}} Christian Lee \| align=center\| Welterweight of MMA Lightweight of MMA Featherweight of MMA \| align=center\| 1 4 0 \| align=center\| 0 0 0 \| align=center\| 0 0 0 \| align=center\| 0 1 1
rowspan="8"\|4 \| {{flagicon\|RUS}} Anatoly Malykhin \| align=center\| Heavyweight of MMA Light Heavyweight of MMA Middleweight of MMA \| align=center\| 2 1 1 \| align=center\| 0 0 0 \| align=center\| 0 0 0 \| align=center\| 1 0 0
{{flagicon\|JPN}} Shinya Aoki \| align=center\| Welterweight of MMA Lightweight of MMA \| align=center\| 0 4 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 1 2
{{flagicon\|THA}} Sam-A Gaiyanghadao \| align=center\| Strawweight of Kickboxing Flyweight of Muay Thai Strawweight of Muay Thai \| align=center\| 1 1 2 \| align=center\| 0 0 0 \| align=center\| 0 0 0 \| align=center\| 0 1 1
{{flagicon\|RUS}} Marat Gafurov \| align=center\| Featherweight of MMA \| align=center\| 4 \| align=center\| 0 \| align=center\| 0 \| align=center\| 1
{{flagicon\|USA}} Ben Askren \| align=center\| Welterweight of MMA \| align=center\| 4 \| align=center\| 0 \| align=center\| 1 \| align=center\| 0
{{flagicon\|NED}} Reinier de Ridder \| align=center\| Light Heavyweight of MMA Middleweight of MMA \| align=center\| 1 3 \| align=center\| 0 0 \| align=center\| 0 0 \| align=center\| 1 1
{{flagicon\|THA}} Petchmorakot Petchyindee \| align=center\| Featherweight of Muay Thai \| align=center\| 4 \| align=center\| 0 \| align=center\| 0 \| align=center\| 1
{{flagicon\|USA}} Mikey Musumeci \| align=center\| Flyweight of Submission grappling \| align=center\| 4 \| align=center\| 0 \| align=center\| 0 \| align=center\| 0

class="wikitable"

Title wins

! Champion

! Weight class

! W

! D

! NC

! L

rowspan="1"|11

| {{flagicon|BRA}} Bibiano Fernandes

| align=center| Bantamweight of MMA

| align=center| 11

| align=center| 0

| align=center| 2

rowspan="1"|9

| {{flagicon|SUR}} Regian Eersel

| align=center| Lightweight of Kickboxing
Lightweight of Muay Thai

| align=center| 6
3

| align=center| 0
0

| align=center| 1
0

rowspan="3"|8

| {{flagicon|BRA}} Adriano Moraes

| align=center| Flyweight of MMA

| align=center| 8

| align=center| 0

| align=center| 4

{{flagicon|CHN}} Xiong Jing Nan

| align=center| Women's Strawweight of MMA
Women's Atomweight of MMA

| align=center| 8
0

| align=center| 0
0

| align=center| 0
1

{{flagicon|THA}} Nong-O Gaiyanghadao

| align=center| Bantamweight of Muay Thai

| align=center| 8

| align=center| 0

| align=center| 1

rowspan="3"|6

| {{flagicon|Myanmar}} Aung La Nsang

| align=center| Light Heavyweight of MMA
Middleweight of MMA

| align=center| 2
4

| align=center| 0
0

| align=center| 1
2

{{flagicon|USA}} Angela Lee

| align=center| Women's Strawweight of MMA
Women's Atomweight of MMA

| align=center| 0
6

| align=center| 0
0

| align=center| 2
0

{{flagicon|THA}} Rodtang Jitmuangnon

| align=center| Flyweight of Muay Thai

| align=center| 6

| align=center| 0

rowspan="3"|5

| {{flagicon|AUS}} Martin Nguyen

| align=center| Lightweight of MMA
Featherweight of MMA
Bantamweight of MMA

| align=center| 1
4
0

| align=center| 0
0
0

| align=center| 0
2
2

{{flagicon|PHI}} Joshua Pacio

| align=center| Strawweight of MMA

| align=center| 5

| align=center| 0

| align=center| 3

{{flagicon|USA}} Christian Lee

| align=center| Welterweight of MMA
Lightweight of MMA
Featherweight of MMA

| align=center| 1
4
0

| align=center| 0
0
0

| align=center| 0
1
1

rowspan="8"|4

| {{flagicon|RUS}} Anatoly Malykhin

| align=center| Heavyweight of MMA
Light Heavyweight of MMA
Middleweight of MMA

| align=center| 2
1
1

| align=center| 0
0
0

| align=center| 1
0
0

{{flagicon|JPN}} Shinya Aoki

| align=center| Welterweight of MMA
Lightweight of MMA

| align=center| 0
4

| align=center| 0
0

| align=center| 1
2

{{flagicon|THA}} Sam-A Gaiyanghadao

| align=center| Strawweight of Kickboxing
Flyweight of Muay Thai
Strawweight of Muay Thai

| align=center| 1
1
2

| align=center| 0
0
0

| align=center| 0
1
1

{{flagicon|RUS}} Marat Gafurov

| align=center| Featherweight of MMA

| align=center| 4

| align=center| 0

| align=center| 1

{{flagicon|USA}} Ben Askren

| align=center| Welterweight of MMA

| align=center| 4

| align=center| 0

| align=center| 1

| align=center| 0

{{flagicon|NED}} Reinier de Ridder

| align=center| Light Heavyweight of MMA
Middleweight of MMA

| align=center| 1
3

| align=center| 0
0

| align=center| 1
1

{{flagicon|THA}} Petchmorakot Petchyindee

| align=center| Featherweight of Muay Thai

| align=center| 4

| align=center| 0

| align=center| 1

{{flagicon|USA}} Mikey Musumeci

| align=center| Flyweight of Submission grappling

| align=center| 4

| align=center| 0

=Most consecutive title defenses=

class="wikitable"
Defenses	Champion	Division	Period
rowspan="3"\| 7 \| {{flagicon\|BRA}} Bibiano Fernandes \| align=center \| Bantamweight of MMA \| align=center \| October 13, 2013 — July 27, 2018
{{flagicon\|CHN}} Xiong Jing Nan \| align=center \| Women's Strawweight of MMA \| align=center \| January 20, 2018 — present
{{flagicon\|THA}} Nong-O Gaiyanghadao \| align=center \| Bantamweight of Muay Thai \| align=center \| February 16, 2019 — April 22, 2023
rowspan="2"\| 5 \|{{flagicon\|USA}} Angela Lee \| align=center \| Women's Atomweight of MMA \| align=center \| May 6, 2016 — September 30, 2023
{{flagicon\|THA}} Rodtang Jitmuangnon \| align=center \| Flyweight of Muay Thai \| align=center \| August 2, 2019 — November 7, 2024
rowspan="1"\| 4 \| {{flagicon\|SUR}} Regian Eersel \| align=center \| Lightweight of Kickboxing \| align=center \| May 17, 2019 — present
rowspan="6"\| 3 \| {{flagicon\|USA}} Ben Askren \| align=center \| Welterweight of MMA \| align=center \| August 29, 2014 — October 24, 2018
{{flagicon\|Myanmar}} Aung La Nsang \| align=center \| Middleweight of MMA \| align=center \| June 30, 2017 — October 30, 2020
{{flagicon\|AUS}} Martin Nguyen \| align=center \| Featherweight of MMA \| align=center \| August 18, 2017 — October 30, 2020
{{flagicon\|THA}} Petchmorakot Petchyindee \| align=center \| Featherweight of Muay Thai \| align=center \| February 7, 2020 — September 29, 2022
{{flagicon\|PHI}} Joshua Pacio \| align=center \| Strawweight of MMA \| align=center \| April 12, 2019 — December 3, 2022
{{flagicon\|USA}} Mikey Musumeci \| align=center \| Flyweight of Submission Grappling \| align=center \| October 1, 2022 — September 5, 2024

class="wikitable"

Defenses

Champion

Division

Period

rowspan="3"| 7

| {{flagicon|BRA}} Bibiano Fernandes

| align=center | Bantamweight of MMA

| align=center | October 13, 2013 — July 27, 2018

{{flagicon|CHN}} Xiong Jing Nan

| align=center | Women's Strawweight of MMA

| align=center | January 20, 2018 — present

{{flagicon|THA}} Nong-O Gaiyanghadao

| align=center | Bantamweight of Muay Thai

| align=center | February 16, 2019 — April 22, 2023

rowspan="2"| 5

|{{flagicon|USA}} Angela Lee

| align=center | Women's Atomweight of MMA

| align=center | May 6, 2016 — September 30, 2023

{{flagicon|THA}} Rodtang Jitmuangnon

| align=center | Flyweight of Muay Thai

| align=center | August 2, 2019 — November 7, 2024

rowspan="1"| 4

| {{flagicon|SUR}} Regian Eersel

| align=center | Lightweight of Kickboxing

| align=center | May 17, 2019 — present

rowspan="6"| 3

| {{flagicon|USA}} Ben Askren

| align=center | Welterweight of MMA

| align=center | August 29, 2014 — October 24, 2018

{{flagicon|Myanmar}} Aung La Nsang

| align=center | Middleweight of MMA

| align=center | June 30, 2017 — October 30, 2020

{{flagicon|AUS}} Martin Nguyen

| align=center | Featherweight of MMA

| align=center | August 18, 2017 — October 30, 2020

{{flagicon|THA}} Petchmorakot Petchyindee

| align=center | Featherweight of Muay Thai

| align=center | February 7, 2020 — September 29, 2022

{{flagicon|PHI}} Joshua Pacio

| align=center | Strawweight of MMA

| align=center | April 12, 2019 — December 3, 2022

{{flagicon|USA}} Mikey Musumeci

| align=center | Flyweight of Submission Grappling

| align=center | October 1, 2022 — September 5, 2024

=Multi-division champions=

class="wikitable"

style="background-color:#C0C0C0"|

|Interim title

class="wikitable"
No. ! Champion ! Division ! Won ! Lost ! Defenses ! Reign ! Total Reign
rowspan=2 \| 1 \| align=left rowspan=2 \| {{flagicon\|AUS}} Martin Nguyen \| align=center rowspan=1 \| Lightweight of MMA \| align=center \| November 10, 2017 (ONE: Legends of the World) \| align=center \| September 28, 2018 (Stripped) \| align=center \| 0 \| align=center \| 322 days \| align=center rowspan=2 \| 1491 days
align=center rowspan=1 \| Featherweight of MMA \| align=center \| August 18, 2017 (ONE: Quest for Greatness) \| align=center \| October 30, 2020 (ONE: Inside the Matrix) \| align=center \| 3 \| align=center \| 1169 days
rowspan=2 \| 2 \| align=left rowspan=2 \| {{flagicon\|Myanmar}} Aung La Nsang \| align=center rowspan=1 \| Light Heavyweight of MMA \| align=center \| February 23, 2018 (ONE: Quest for Gold) \| align=center \| April 28, 2021 (ONE on TNT 4) \| align=center \| 1 \| align=center \| 1161 days \| align=center rowspan=2 \| 2379 days
align=center rowspan=1 \| Middleweight of MMA \| align=center \| June 30, 2017 (ONE: Light of a Nation) \| align=center \| October 30, 2020 (ONE: Inside the Matrix) \| align=center \| 3 \| align=center \| 1218 days
rowspan=3 \| 3 \| align=left rowspan=3 \| {{flagicon\|THA}} Sam-A Gaiyanghadao \| align=center rowspan=1 \| Strawweight of Kickboxing \| align=center \| December 6, 2019 (ONE: Mark Of Greatness) \| align=center \| February 19, 2022 (Retirement) \| align=center \| 0 \| align=center \| 806 days \| align=center rowspan=3 \| 1674 days
align=center rowspan=1 \| Flyweight of Muay Thai \| align=center \| May 18, 2018 (ONE: Unstoppable Dreams) \| align=center \| May 4, 2019 (ONE: For Honor) \| align=center \| 0 \| align=center \| 350 days
align=center rowspan=1 \| Strawweight of Muay Thai \| align=center \| February 28, 2020 (ONE: King of the Jungle) \| align=center \| 30 July 2021 (ONE: Battleground) \| align=center \| 1 \| align=center \| 518 days
rowspan=2 \| 4 \| align=left rowspan=2 \| {{flagicon\|THA}} Stamp Fairtex \| align=center rowspan=1 \| Women's Atomweight of Kickboxing \| align=center \| October 6, 2018 (ONE: Kingdom of Heroes) \| align=center \| February 28, 2020 (ONE: King of the Jungle) \| align=center \| 0 \| align=center \| 510 days \| align=center rowspan=2 \| 1063 days
align=center rowspan=1 \| Women's Atomweight of Muay Thai \| align=center \| February 22, 2019 (ONE: Call to Greatness) \| align=center \| August 28, 2020 (ONE: A New Breed) \| align=center \| 1 \| align=center \| 553 days
rowspan=2 \| 5 \| align=left rowspan=2 \| {{flagicon\|NED}} Reinier de Ridder \| align=center rowspan=1 \| Light Heavyweight of MMA \| align=center \| April 28, 2021 (ONE on TNT 4) \| align=center \| December 3, 2022 (ONE on Prime Video 5) \| align=center \| 0 \| align=center \| 584 days \| align=center rowspan=2 \| {{#expr: {{age in days\|2021\|4\|28}} + {{age in days\|2020\|10\|30}} }} days
align=center rowspan=1 \| Middleweight of MMA \| align=center \| October 30, 2020 (ONE: Inside the Matrix) \| align=center \|March 1, 2024 (ONE 166) \| align=center \| 2 \| align=center \| {{age in days\|2020\|10\|30}} days
rowspan=2 \| 6 \| align=left rowspan=2 \| {{flagicon\|SUR}} Regian Eersel \| align=center rowspan=1 \| Lightweight of Muay Thai \| align=center \| October 22, 2022 (ONE on Prime Video 3) \| align=center \| Present \| align=center \| 0 \| align=center \| {{age in days\|2022\|10\|22}} days \| align=center rowspan=2 \| {{#expr: {{age in days\|2022\|10\|22}} + {{age in days\|2019\|5\|17}} }} days
align=center rowspan=1 \| Lightweight of Kickboxing \| align=center \| May 17, 2019 (ONE: Enter the Dragon) \| align=center \| Present \| align=center \| 4 \| align=center \| {{age in days\|2019\|5\|17}} days
rowspan=3 \| 7 \| align=left rowspan=3 \| {{flagicon\|USA}} Christian Lee \| align=center rowspan=1 \| Welterweight of MMA \| align=center \|November 19, 2022 (ONE on Prime Video 4) \| align=center \| Present \| align=center \| 0 \| align=center \| {{age in days\|2022\|11\|19}} days \| align=center rowspan=3 \| {{#expr: {{age in days\|2022\|11\|19}} + {{age in days\|2022\|8\|26}} + {{age in days\|2019\|5\|17\|2021\|9\|24}} }} days
align=center rowspan=2 \| Lightweight of MMA \| align=center \| August 26, 2022 (ONE 160) \| align=center \| Present \| align=center \| 0 \| align=center \| {{age in days\|2022\|8\|26}} days
align=center \| May 17, 2019 (ONE: Enter the Dragon) \| align=center \| September 24, 2021 (ONE: Revolution) \| align=center \| 2 \| align=center \| {{age in days\|2019\|5\|17\|2021\|9\|24}} days
rowspan=2 \| 8 \| align=left rowspan=2 \| {{flagicon\|ENG}} Jonathan Haggerty \| align=center rowspan=1 \| Bantamweight of Muay Thai \| align=center \| April 22, 2023 (ONE Fight Night 9) \| align=center \| September 7, 2024 (ONE 168) \| align=center \| 0 \| align=center \| {{age in days\|2023\|4\|22\|2024\|9\|7}} days \| align=center rowspan=2 \| {{#expr: {{age in days\|2019\|5\|4\|2019\|8\|2}} + {{age in days\|2023\|4\|22}} }} days
align=center rowspan=1 \| Flyweight of Muay Thai \| align=center \|May 4, 2019 (ONE: For Honor) \| align=center \|August 2, 2019 (ONE: Dawn of Heroes) \| align=center \| 0 \| align=center \| {{age in days\|2019\|5\|4\|2019\|8\|2}} days
rowspan=4 \| 9 \| align=left rowspan=4 \| {{flagicon\|RUS}} Anatoly Malykhin \| align=center rowspan=2 \| Heavyweight of MMA \| align=center \| June 23, 2023 (ONE Friday Fights 22) \| align=center \| November 9, 2024 (ONE 169) \| align=center \| 0 \| align=center \| {{age in days\|2023\|6\|23\|2024\|11\|9}} days \| align=center rowspan=4 \| {{#expr: {{age in days\|2023\|6\|23}} + {{age in days\|2022\|2\|11\|2023\|6\|23}} + {{age in days\|2022\|12\|3}} + {{age in days\|2024\|3\|1}} }} days
style="background-color:#C0C0C0" \| align=center \|February 11, 2022 (ONE: Bad Blood) \| align=center \|June 23, 2023 (ONE Friday Fights 22) \| align=center \| 0 \| align=center \| {{age in days\|2022\|2\|11\|2023\|6\|23}} days
align=center rowspan=1 \| Light Heavyweight of MMA \| align=center \|December 3, 2022 (ONE on Prime Video 5) \| align=center \|Present \| align=center \| 0 \| align=center \| {{age in days\|2022\|12\|3}} days
align=center rowspan=1 \| Middleweight of MMA \| align=center \|March 1, 2024 (ONE 166) \| align=center \|Present \| align=center \| 0 \| align=center \| {{age in days\|2024\|3\|1}} days
rowspan=3 \| 10 \| align=left rowspan=2 \| {{flagicon\|THA}} Prajanchai P.K.Saenchai \| align=center rowspan=1 \| Strawweight of Muay Thai \| align=center \| December 22, 2023 (ONE: Friday Fights 46) \| align=center \| Present \| align=center \| 0 \| align=center \| {{age in days\|2023\|12\|22}} days \| align=center rowspan=2 \| {{#expr: {{age in days\|2023\|12\|22}} + {{age in days\|2024\|6\|28}} }} days
align=center rowspan=1 \| Strawweight of Kickboxing \| align=center \| June 28, 2024 (ONE Friday Fights 68) \| align=center \| Present \| align=center \| 0 \| align=center \| {{age in days\|2024\|6\|28}} days

class="wikitable"

No.

! Champion

! Division

! Won

! Lost

! Defenses

! Reign

! Total Reign

rowspan=2 | 1

| align=left rowspan=2 | {{flagicon|AUS}} Martin Nguyen

| align=center rowspan=1 | Lightweight of MMA

| align=center | November 10, 2017
(ONE: Legends of the World)

| align=center | September 28, 2018
(Stripped)

| align=center | 0

| align=center | 322 days

| align=center rowspan=2 | 1491 days

align=center rowspan=1 | Featherweight of MMA

| align=center | August 18, 2017
(ONE: Quest for Greatness)

| align=center | October 30, 2020
(ONE: Inside the Matrix)

| align=center | 3

| align=center | 1169 days

rowspan=2 | 2

| align=left rowspan=2 | {{flagicon|Myanmar}} Aung La Nsang

| align=center rowspan=1 | Light Heavyweight of MMA

| align=center | February 23, 2018
(ONE: Quest for Gold)

| align=center | April 28, 2021
(ONE on TNT 4)

| align=center | 1

| align=center | 1161 days

| align=center rowspan=2 | 2379 days

align=center rowspan=1 | Middleweight of MMA

| align=center | June 30, 2017
(ONE: Light of a Nation)

| align=center | October 30, 2020
(ONE: Inside the Matrix)

| align=center | 3

| align=center | 1218 days

rowspan=3 | 3

| align=left rowspan=3 | {{flagicon|THA}} Sam-A Gaiyanghadao

| align=center rowspan=1 | Strawweight of Kickboxing

| align=center | December 6, 2019
(ONE: Mark Of Greatness)

| align=center | February 19, 2022
(Retirement)

| align=center | 0

| align=center | 806 days

| align=center rowspan=3 | 1674 days

align=center rowspan=1 | Flyweight of Muay Thai

| align=center | May 18, 2018
(ONE: Unstoppable Dreams)

| align=center | May 4, 2019
(ONE: For Honor)

| align=center | 0

| align=center | 350 days

align=center rowspan=1 | Strawweight of Muay Thai

| align=center | February 28, 2020
(ONE: King of the Jungle)

| align=center | 30 July 2021
(ONE: Battleground)

| align=center | 1

| align=center | 518 days

rowspan=2 | 4

| align=left rowspan=2 | {{flagicon|THA}} Stamp Fairtex

| align=center rowspan=1 | Women's Atomweight of Kickboxing

| align=center | October 6, 2018
(ONE: Kingdom of Heroes)

| align=center | February 28, 2020
(ONE: King of the Jungle)

| align=center | 0

| align=center | 510 days

| align=center rowspan=2 | 1063 days

align=center rowspan=1 | Women's Atomweight of Muay Thai

| align=center | February 22, 2019
(ONE: Call to Greatness)

| align=center | August 28, 2020
(ONE: A New Breed)

| align=center | 1

| align=center | 553 days

rowspan=2 | 5

| align=left rowspan=2 | {{flagicon|NED}} Reinier de Ridder

| align=center rowspan=1 | Light Heavyweight of MMA

| align=center | April 28, 2021
(ONE on TNT 4)

| align=center | December 3, 2022
(ONE on Prime Video 5)

| align=center | 0

| align=center | 584 days

| align=center rowspan=2 | {{#expr: {{age in days|2021|4|28}} + {{age in days|2020|10|30}} }} days

align=center rowspan=1 | Middleweight of MMA

| align=center | October 30, 2020
(ONE: Inside the Matrix)

| align=center |March 1, 2024
(ONE 166)

| align=center | 2

| align=center | {{age in days|2020|10|30}} days

rowspan=2 | 6

| align=left rowspan=2 | {{flagicon|SUR}} Regian Eersel

| align=center rowspan=1 | Lightweight of Muay Thai

| align=center | October 22, 2022
(ONE on Prime Video 3)

| align=center | Present

| align=center | 0

| align=center | {{age in days|2022|10|22}} days

| align=center rowspan=2 | {{#expr: {{age in days|2022|10|22}} + {{age in days|2019|5|17}} }} days

align=center rowspan=1 | Lightweight of Kickboxing

| align=center | May 17, 2019
(ONE: Enter the Dragon)

| align=center | Present

| align=center | 4

| align=center | {{age in days|2019|5|17}} days

rowspan=3 | 7

| align=left rowspan=3 | {{flagicon|USA}} Christian Lee

| align=center rowspan=1 | Welterweight of MMA

| align=center |November 19, 2022
(ONE on Prime Video 4)

| align=center | Present

| align=center | 0

| align=center | {{age in days|2022|11|19}} days

| align=center rowspan=3 | {{#expr: {{age in days|2022|11|19}} + {{age in days|2022|8|26}} + {{age in days|2019|5|17|2021|9|24}} }} days

align=center rowspan=2 | Lightweight of MMA

| align=center | August 26, 2022
(ONE 160)

| align=center | Present

| align=center | 0

| align=center | {{age in days|2022|8|26}} days

align=center | May 17, 2019
(ONE: Enter the Dragon)

| align=center | September 24, 2021
(ONE: Revolution)

| align=center | 2

| align=center | {{age in days|2019|5|17|2021|9|24}} days

rowspan=2 | 8

| align=left rowspan=2 | {{flagicon|ENG}} Jonathan Haggerty

| align=center rowspan=1 | Bantamweight of Muay Thai

| align=center | April 22, 2023
(ONE Fight Night 9)

| align=center | September 7, 2024
(ONE 168)

| align=center | 0

| align=center | {{age in days|2023|4|22|2024|9|7}} days

| align=center rowspan=2 | {{#expr: {{age in days|2019|5|4|2019|8|2}} + {{age in days|2023|4|22}} }} days

align=center rowspan=1 | Flyweight of Muay Thai

| align=center |May 4, 2019
(ONE: For Honor)

| align=center |August 2, 2019
(ONE: Dawn of Heroes)

| align=center | 0

| align=center | {{age in days|2019|5|4|2019|8|2}} days

rowspan=4 | 9

| align=left rowspan=4 | {{flagicon|RUS}} Anatoly Malykhin

| align=center rowspan=2 | Heavyweight of MMA

| align=center | June 23, 2023
(ONE Friday Fights 22)

| align=center | November 9, 2024
(ONE 169)

| align=center | 0

| align=center | {{age in days|2023|6|23|2024|11|9}} days

| align=center rowspan=4 | {{#expr: {{age in days|2023|6|23}} + {{age in days|2022|2|11|2023|6|23}} + {{age in days|2022|12|3}} + {{age in days|2024|3|1}} }} days

style="background-color:#C0C0C0"

| align=center |February 11, 2022
(ONE: Bad Blood)

| align=center |June 23, 2023
(ONE Friday Fights 22)

| align=center | 0

| align=center | {{age in days|2022|2|11|2023|6|23}} days

align=center rowspan=1 | Light Heavyweight of MMA

| align=center |December 3, 2022
(ONE on Prime Video 5)

| align=center |Present

| align=center | 0

| align=center | {{age in days|2022|12|3}} days

align=center rowspan=1 | Middleweight of MMA

| align=center |March 1, 2024
(ONE 166)

| align=center |Present

| align=center | 0

| align=center | {{age in days|2024|3|1}} days

rowspan=3 | 10

| align=left rowspan=2 | {{flagicon|THA}} Prajanchai P.K.Saenchai

| align=center rowspan=1 | Strawweight of Muay Thai

| align=center | December 22, 2023
(ONE: Friday Fights 46)

| align=center | Present

| align=center | 0

| align=center | {{age in days|2023|12|22}} days

| align=center rowspan=2 | {{#expr: {{age in days|2023|12|22}} + {{age in days|2024|6|28}} }} days

align=center rowspan=1 | Strawweight of Kickboxing

| align=center | June 28, 2024
(ONE Friday Fights 68)

| align=center | Present

| align=center | 0

| align=center | {{age in days|2024|6|28}} days

= Simultaneous two division champions =

{{small | This table, different from the previous one, only counts the periods in which the fighter loaded the titles simultaneously and the defenses in that period of time.}}

class="wikitable"
No.	Champion	Division	Span	Defenses	Simultaneous Reign
rowspan=2 \| 1 \| align=left rowspan=2 \| {{flagicon\|AUS}} Martin Nguyen \| align=center rowspan=1 \| Lightweight of MMA \| align=center rowspan=2 \| November 10, 2017 — September 28, 2018 \| align=center \| 0 \| align=center rowspan=2 \| {{formatnum:{{age in days\|2017\|11\|10\|show unit=\|2018\|9\|28

class="wikitable"

No.

Champion

Division

Span

Defenses

Simultaneous Reign

rowspan=2 | 1

| align=left rowspan=2 | {{flagicon|AUS}} Martin Nguyen

| align=center rowspan=1 | Lightweight of MMA

| align=center rowspan=2 | November 10, 2017 — September 28, 2018

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2017|11|10|show unit=|2018|9|28

} }} days

| align=center rowspan=1 | Featherweight of MMA

| align=center | 1

! rowspan=2 | 2

| align=left rowspan=2 | {{flagicon|Myanmar}} Aung La Nsang

| align=center rowspan=1 | Light Heavyweight of MMA

| align=center rowspan=2 | February 23, 2018 — October 30, 2020

| align=center | 1

| align=center rowspan=2 | {{formatnum:{{age in days|2018|2|23|show unit=|2020|10|30|}} }} days

| align=center rowspan=1 | Middleweight of MMA

| align=center | 3

! rowspan=2 | 3

| align=left rowspan=2 | {{flagicon|THA}} Sam-A Gaiyanghadao

| align=center rowspan=1 | Strawweight of Kickboxing

| align=center rowspan=2 | February 28, 2020 — July 30, 2021

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2020|2|28|show unit=|2021|7|30|}} }} days

| align=center rowspan=1 | Strawweight of Muay Thai

| align=center | 1

! rowspan=2 | 4

| align=left rowspan=2 | {{flagicon|THA}} Stamp Fairtex

| align=center rowspan=1 | Women's Atomweight of Kickboxing

| align=center rowspan=2 | February 22, 2019 — February 28, 2020

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2019|2|22|show unit=|2020|2|28|}} }} days

| align=center rowspan=1 | Women's Atomweight of Muay Thai

| align=center | 1

! rowspan=2 | 5

| align=left rowspan=2 | {{flagicon|NED}} Reinier de Ridder

| align=center rowspan=1 | Light Heavyweight of MMA

| align=center rowspan=2 | April 28, 2021 — December 3, 2022

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2021|4|28|show unit=|2022|12|3|}} }} days

| align=center rowspan=1 | Middleweight of MMA

| align=center | 2

! rowspan=2 | 6

| align=left rowspan=2 | {{flagicon|SUR}} Regian Eersel

| align=center rowspan=1 | Lightyweight of Muay Thai

| align=center rowspan=2 | October 22, 2022 — present

| align=center | 2

| align=center rowspan=2 | {{formatnum:{{age in days|2022|10|22|show unit=full}} }}

| align=center rowspan=1 | Lightweight of Kickboxing

| align=center | 4

! rowspan=2 | 7

| align=left rowspan=2 | {{flagicon|USA}} Christian Lee

| align=center rowspan=1 | Welteryweight of MMA

| align=center rowspan=2 | November 19, 2022 — present

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2022|11|18|show unit=full}} }}

| align=center rowspan=1 | Lightweight of MMA

| align=center | 0

! rowspan=2 | 7

| align=left rowspan=2 | {{flagicon|RUS}} Anatoly Malykhin

| align=center rowspan=1 | Heavyweight of MMA

| align=center rowspan=2 | June 23, 2023 — November 9, 2024

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2023|06|23|show unit=|2024|11|9|}} }} days

| align=center rowspan=1 | Light Heavyweight of MMA

| align=center | 0

! rowspan=2 | 8

| align=left rowspan=2 | {{flagicon|ENG}} Jonathan Haggerty

| align=center rowspan=1 | Bantamweight of Muay Thai

| align=center rowspan=2 | November 4, 2023 — present

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2023|11|04|show unit=full}} }}

| align=center rowspan=1 | Bantamweight of Kickboxing

| align=center | 0

! rowspan=2 | 9

| align=left rowspan=2 | {{flagicon|UKR}} Roman Kryklia

| align=center rowspan=1 | Light Heavyweight of Kickboxing

| align=center rowspan=2 | December 8, 2023 — present

| align=center | 0

| align=center rowspan=2 | {{formatnum:{{age in days|2023|12|08|show unit=full}} }}

| align=center rowspan=1 | Heavyweight of Muay Thai

| align=center | 0

=Champions by nationality=

Fighters with multiple title reigns in a specific division are only counted once. Interim champions who never became linear champions are only listed in parentheses.

Country	MMA	Kickboxing	Muay Thai	Submission Grappling	Tournament
class="wikitable sortable" style="text-align:center"
style="text-align:left" \| {{flagicon\|USA}} United States \| 8	1	0 {{small\|(1)}}	4	2	13
style="text-align:left" \| {{flagicon\|Brazil}} Brazil \| 6	0	1	1	0	8
style="text-align:left" \| {{flagicon\|Japan}} Japan \| 5	1	0	0	1	6
style="text-align:left" \| {{flagicon\|Russia}} Russia \| 5	1	0	0	0	6
style="text-align:left" \| {{flagicon\|Philippines}} Philippines \| 5	0	0	0	0	5
style="text-align:left" \| {{flagicon\|South Korea}} South Korea \| 3	0	0	0	0	3
style="text-align:left" \| {{flagicon\|Thailand}} Thailand \| 2	8	8	0	2	18
style="text-align:left" \| {{flagicon\|NED}} Netherlands \| 2	1	0	0	0	3
style="text-align:left" \| {{flagicon\|ENG}} England \| 0	1	2	0	0	3
style="text-align:left" \| {{flagicon\|China}} China \| 2	0	0	0	7	2
style="text-align:left" \| {{flagicon\|Myanmar}} Myanmar \| 2	0	0	0	4	2
style="text-align:left" \| {{flagicon\|Australia}} Australia \| 2	0	0	0	0	2
style="text-align:left" \| {{flagicon\|Kazakhstan}} Kazakhstan \| 2	0	0	0	0	2
style="text-align:left" \| {{flagicon\|SWE}} Sweden \| 1	0	1	0	0	2
style="text-align:left" \| {{flagicon\|CAN}} Canada \| 1	1	0	0	0	2
style="text-align:left" \| {{flagicon\|UKR}} Ukraine \| 0	1	1	0	0	2
style="text-align:left" \| {{flagicon\|SUR}} Suriname \| 0	1	1	0	0	2
style="text-align:left" \| {{flagicon\|SEN}} Senegal \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|Mongolia}} Mongolia \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|Kyrgyzstan}} Kyrgyzstan \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|ITA}} Italy \| 0	1	1	0	1	1
style="text-align:left" \| {{flagicon\|BLR}} Belarus \| 0	1	0	0	1	1
style="text-align:left" \| {{flagicon\|Taiwan}} Taiwan \| 0	1	0	0	0	1
style="text-align:left" \| {{flagicon\|FRA}} France \| 0	1	0	0	0	1
style="text-align:left" \| {{flagicon\|Cambodia}} Cambodia \| 0	0	0	0	1	0
style="text-align:left" \| {{flagicon\|Malaysia}} Malaysia \| 0	0	0	0	1	0

References

External links

[https://www.onefc.com/world-champions/ Current title holders] at ONE's official website

ONE Champions

Country	MMA	Kickboxing	Muay Thai	Submission Grappling	Tournament
class="wikitable sortable" style="text-align:center"
style="text-align:left" \| {{flagicon\|USA}} United States \| 8	1	0 {{small\|(1)}}	4	2	13
style="text-align:left" \| {{flagicon\|Brazil}} Brazil \| 6	0	1	1	0	8
style="text-align:left" \| {{flagicon\|Japan}} Japan \| 5	1	0	0	1	6
style="text-align:left" \| {{flagicon\|Russia}} Russia \| 5	1	0	0	0	6
style="text-align:left" \| {{flagicon\|Philippines}} Philippines \| 5	0	0	0	0	5
style="text-align:left" \| {{flagicon\|South Korea}} South Korea \| 3	0	0	0	0	3
style="text-align:left" \| {{flagicon\|Thailand}} Thailand \| 2	8	8	0	2	18
style="text-align:left" \| {{flagicon\|NED}} Netherlands \| 2	1	0	0	0	3
style="text-align:left" \| {{flagicon\|ENG}} England \| 0	1	2	0	0	3
style="text-align:left" \| {{flagicon\|China}} China \| 2	0	0	0	7	2
style="text-align:left" \| {{flagicon\|Myanmar}} Myanmar \| 2	0	0	0	4	2
style="text-align:left" \| {{flagicon\|Australia}} Australia \| 2	0	0	0	0	2
style="text-align:left" \| {{flagicon\|Kazakhstan}} Kazakhstan \| 2	0	0	0	0	2
style="text-align:left" \| {{flagicon\|SWE}} Sweden \| 1	0	1	0	0	2
style="text-align:left" \| {{flagicon\|CAN}} Canada \| 1	1	0	0	0	2
style="text-align:left" \| {{flagicon\|UKR}} Ukraine \| 0	1	1	0	0	2
style="text-align:left" \| {{flagicon\|SUR}} Suriname \| 0	1	1	0	0	2
style="text-align:left" \| {{flagicon\|SEN}} Senegal \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|Mongolia}} Mongolia \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|Kyrgyzstan}} Kyrgyzstan \| 1	0	0	0	0	1
style="text-align:left" \| {{flagicon\|ITA}} Italy \| 0	1	1	0	1	1
style="text-align:left" \| {{flagicon\|BLR}} Belarus \| 0	1	0	0	1	1
style="text-align:left" \| {{flagicon\|Taiwan}} Taiwan \| 0	1	0	0	0	1
style="text-align:left" \| {{flagicon\|FRA}} France \| 0	1	0	0	0	1
style="text-align:left" \| {{flagicon\|Cambodia}} Cambodia \| 0	0	0	0	1	0
style="text-align:left" \| {{flagicon\|Malaysia}} Malaysia \| 0	0	0	0	1	0

List of ONE Championship champions#Flyweight

Current champions

Men's championship history

= Heavyweight World Championship =

= Light Heavyweight World Championship =

= Middleweight World Championship =

= Welterweight World Championship =

= Lightweight World Championship=

= Featherweight World Championship =

= Bantamweight World Championship =

= Flyweight World Championship =

= Strawweight World Championship =

Women's championship history

= Women's Strawweight World Championship =

= Women's Atomweight World Championship =

Tournament winners

Records

=Most wins in title bouts=

=Most consecutive title defenses=

=Multi-division champions=

= Simultaneous two division champions =

=Champions by nationality=

See also

References

External links