Youngest champions: since 2001
Youngest fighters to win an undisputed UFC title, by age on the day.
Reigns are derived from championship bouts. When a belt was vacated or stripped outside a title fight, the reign is shown ending at the next title fight in that division, so a few run long; a title awarded without a fight (José Aldo's in 2010, for one) starts at the champion's first UFC title fight.
102 fighters.
| # | Fighter | Age | Division | Won | Ended |
|---|---|---|---|---|---|
| 51 | Zhang Weili | 30 years, 18 days | Women's Strawweight | Aug 31, 2019 | Apr 24, 2021 |
| 52 | Israel Adesanya | 30 years, 75 days | Middleweight | Oct 5, 2019 | Nov 12, 2022 |
| 53 | Rafael Dos Anjos | 30 years, 139 days | Lightweight | Mar 14, 2015 | Jul 7, 2016 |
| 54 | Johny Hendricks | 30 years, 184 days | Welterweight | Mar 15, 2014 | Dec 6, 2014 |
| 55 | Rich Franklin | 30 years, 242 days | Middleweight | Jun 4, 2005 | Oct 14, 2006 |
| 56 | Valentina Shevchenko | 30 years, 276 days | Women's Flyweight | Dec 8, 2018 | Mar 4, 2023 |
| 57 | Lyoto Machida | 30 years, 358 days | Light Heavyweight | May 23, 2009 | May 8, 2010 |
| =58 | Leon Edwards | 30 years, 360 days | Welterweight | Aug 20, 2022 | Jul 27, 2024 |
| =58 | Islam Makhachev | 30 years, 360 days | Lightweight | Oct 22, 2022 | Jun 28, 2025 |
| 60 | Luke Rockhold | 31 years, 56 days | Middleweight | Dec 12, 2015 | Jun 4, 2016 |
| 61 | Alexander Volkanovski | 31 years, 76 days | Featherweight | Dec 14, 2019 | Feb 17, 2024 |
| 62 | Khamzat Chimaev | 31 years, 107 days | Middleweight | Aug 16, 2025 | May 9, 2026 |
| 63 | Brock Lesnar | 31 years, 126 days | Heavyweight | Nov 15, 2008 | Oct 23, 2010 |
| 64 | Henry Cejudo | 31 years, 176 days | Flyweight | Aug 4, 2018 | Jul 18, 2020 |
| 65 | Anderson Silva | 31 years, 183 days | Middleweight | Oct 14, 2006 | Jul 6, 2013 |
| 66 | Charles Oliveira | 31 years, 210 days | Lightweight | May 15, 2021 | Oct 22, 2022 |
| 67 | Aljamain Sterling | 31 years, 218 days | Bantamweight | Mar 6, 2021 | Aug 19, 2023 |
| 68 | Jamahal Hill | 31 years, 247 days | Light Heavyweight | Jan 21, 2023 | Nov 11, 2023 |
| 69 | Kamaru Usman | 31 years, 295 days | Welterweight | Mar 2, 2019 | Aug 20, 2022 |
| 70 | Cristiane Justino | 32 years, 20 days | Women's Featherweight | Jul 29, 2017 | Dec 29, 2018 |
| 71 | Julianna Pena | 32 years, 114 days | Women's Bantamweight | Dec 11, 2021 | Jul 30, 2022 |
| 72 | Eddie Alvarez | 32 years, 178 days | Lightweight | Jul 7, 2016 | Nov 12, 2016 |
| 73 | Sean Strickland | 32 years, 194 days | Middleweight | Sep 9, 2023 | Jan 20, 2024 |
| 74 | Tom Aspinall | 32 years, 197 days | Heavyweight | Oct 25, 2025 | Champion |
| 75 | Deiveson Figueiredo | 32 years, 213 days | Flyweight | Jul 18, 2020 | Jun 12, 2021 |
| 76 | Mackenzie Dern | 32 years, 215 days | Women's Strawweight | Oct 25, 2025 | Champion |
| 77 | Robbie Lawler | 32 years, 261 days | Welterweight | Dec 6, 2014 | Jul 30, 2016 |
| 78 | Magomed Ankalaev | 32 years, 279 days | Light Heavyweight | Mar 8, 2025 | Oct 4, 2025 |
| 79 | Germaine de Randamie | 32 years, 293 days | Women's Featherweight | Feb 11, 2017 | Jul 29, 2017 |
| 80 | Matt Serra | 32 years, 309 days | Welterweight | Apr 7, 2007 | Apr 19, 2008 |
| 81 | Sean Sherk | 33 years, 70 days | Lightweight | Oct 14, 2006 | Jan 19, 2008 |
| 82 | Alexandre Pantoja | 33 years, 83 days | Flyweight | Jul 8, 2023 | Dec 6, 2025 |
| 83 | Merab Dvalishvili | 33 years, 248 days | Bantamweight | Sep 14, 2024 | Dec 6, 2025 |
| 84 | Stipe Miocic | 33 years, 269 days | Heavyweight | May 14, 2016 | Jul 7, 2018 |
| 85 | Evan Tanner | 33 years, 360 days | Middleweight | Feb 5, 2005 | Jun 4, 2005 |
| 86 | Holly Holm | 34 years, 28 days | Women's Bantamweight | Nov 14, 2015 | Mar 5, 2016 |
| 87 | Tyron Woodley | 34 years, 114 days | Welterweight | Jul 30, 2016 | Mar 2, 2019 |
| 88 | Francis Ngannou | 34 years, 203 days | Heavyweight | Mar 27, 2021 | Mar 4, 2023 |
| 89 | Kayla Harrison | 34 years, 340 days | Women's Bantamweight | Jun 7, 2025 | Champion |
| 90 | Chuck Liddell | 35 years, 120 days | Light Heavyweight | Apr 16, 2005 | May 26, 2007 |
| 91 | Alex Pereira | 35 years, 128 days | Middleweight | Nov 12, 2022 | Apr 8, 2023 |
| 92 | Raquel Pennington | 35 years, 137 days | Women's Bantamweight | Jan 20, 2024 | Oct 5, 2024 |
| 93 | Carlos Ulberg | 35 years, 155 days | Light Heavyweight | Apr 11, 2026 | Champion |
| 94 | Murilo Bustamante | 35 years, 165 days | Middleweight | Jan 11, 2002 | Feb 5, 2005 |
| 95 | Belal Muhammad | 36 years, 18 days | Welterweight | Jul 27, 2024 | May 10, 2025 |
| 96 | Daniel Cormier | 36 years, 64 days | Light Heavyweight | May 23, 2015 | Dec 29, 2018 |
| 97 | Michael Bisping | 37 years, 97 days | Middleweight | Jun 4, 2016 | Nov 4, 2017 |
| 98 | Justin Gaethje | 37 years, 212 days | Lightweight | Jun 14, 2026 | Champion |
| 99 | Jan Blachowicz | 37 years, 215 days | Light Heavyweight | Sep 26, 2020 | Oct 30, 2021 |
| 100 | Fabricio Werdum | 37 years, 318 days | Heavyweight | Jun 13, 2015 | May 14, 2016 |