| Liang Na (inactive) | The Dragon Girl | 0-4-0 | China | Apr 27, 2024 |
| Muhammad Naimov | Hillman | 5-3-0 | Tajikistan | Sep 5, 2026 |
| Rin Nakai (inactive) | | 0-2-0 | Japan | Mar 19, 2016 |
| Kazuhiro Nakamura (inactive) | Kaz | 0-2-0 | Japan | May 24, 2008 |
| Keiichiro Nakamura | | 1-0-0 | Japan | Jan 31, 2026 |
| Keita Nakamura (inactive) | K-Taro | 4-7-0 | Japan | Apr 20, 2019 |
| Rinya Nakamura | Hybred | 4-2-0 | Japan | Sep 26, 2026 |
| Jutaro Nakao (inactive) | | 1-1-0 | Japan | Mar 22, 2002 |
| Mandel Nallo | Mango | 0-1-0 | Canada | Apr 18, 2026 |
| Tyson Nam (inactive) | | 3-5-0 | United States | Jul 15, 2023 |
| Yui Chul Nam (inactive) | The Korean Bulldozer | 1-2-0 | South Korea | Nov 28, 2015 |
| Rose Namajunas | Thug | 12-7-0 | United States | Jan 24, 2026 |
| Nad Narimani (inactive) | Smiler | 2-2-0 | United Kingdom | Jul 18, 2020 |
| Roger Narvaez (inactive) | Silverback | 1-2-0 | United States | Mar 14, 2015 |
| Allan Nascimento | Puro Osso | 4-2-0 | Brazil | Jun 20, 2026 |
| Jefferson Nascimento | Toddynho | 0-1-0 | Brazil | Jun 27, 2026 |
| Rodrigo Nascimento (inactive) | Ze Colmeia | 4-3-0 (1 NC) | Unknown | Nov 2, 2024 |
| Bobby Nash (inactive) | | 0-3-0 | United States | Nov 25, 2017 |
| Reza Nasri (inactive) | | 0-1-0 | Unknown | Sep 20, 1996 |
| Rafael Natal (inactive) | Sapo | 9-7-1 | Brazil | Jul 22, 2017 |
| Kevin Natividad (inactive) | Quicksand | 0-3-0 | United States | Nov 19, 2022 |
| Ismail Naurdiev | | 5-3-0 | Morocco | Oct 3, 2026 |
| Tafon Nchukwi (inactive) | Da Don | 2-4-0 | Cameroon | Aug 12, 2023 |
| Dustin Neace (inactive) | The Beast | 0-1-0 | United States | Dec 3, 2011 |
| Geoff Neal | Handz of Steel | 8-6-0 | United States | Feb 21, 2026 |
| Stanislav Nedkov (inactive) | Stucky | 1-2-0 (1 NC) | Bulgaria | Jan 24, 2015 |
| Josh Neer (inactive) | The Dentist | 6-9-0 | United States | Feb 23, 2013 |
| Nicolae Negumereanu (inactive) | | 4-2-0 | Romania | Nov 12, 2022 |
| Steve Nelmark (inactive) | The Sandman | 2-1-0 | United States | Dec 7, 1996 |
| Cam Nelson | | 1-0-0 | Canada | Aug 29, 2026 |
| Gunnar Nelson | Gunni | 10-6-0 | Iceland | Mar 22, 2025 |
| Kyle Nelson | The Monster | 5-6-1 | Canada | Mar 28, 2026 |
| Roy Nelson (inactive) | Big Country | 9-10-0 | United States | Apr 15, 2017 |
| Shane Nelson (inactive) | Sugar | 2-2-0 | United States | Dec 12, 2009 |
| Antonio Braga Neto (inactive) | | 1-2-0 | Brazil | Dec 9, 2017 |
| Mario Neto (inactive) | Sukata | 0-1-0 | Brazil | Sep 23, 2006 |
| Journey Newson | | 1-4-0 (1 NC) | United States | Apr 29, 2023 |
| Carlos Newton (inactive) | The Ronin | 3-4-0 | Anguilla | Jan 31, 2004 |
| Jeff Newton (inactive) | | 0-1-0 | United States | Nov 19, 2005 |
| Francis Ngannou (inactive) | The Predator | 12-2-0 | Cameroon | Jan 22, 2022 |
| Ben Nguyen (inactive) | Ten | 4-3-0 | United States | Dec 1, 2018 |
| Steven Nguyen | The Ninja | 1-1-0 | United States | Jul 26, 2025 |
| Alex Nicholson (inactive) | The Spartan | 1-3-0 | United States | May 28, 2017 |
| Bo Nickal | | 6-1-0 | United States | Jun 14, 2026 |
| Mike Nickels (inactive) | | 1-1-0 | United States | Jul 7, 2007 |
| Matheus Nicolau (inactive) | | 7-4-0 | Brazil | Oct 19, 2024 |
| Stewart Nicoll (inactive) | Kakamora | 0-4-0 | Solomon Islands | Jul 18, 2026 |
| Tom Niinimaki (inactive) | Stoneface | 1-3-0 | Finland | Dec 20, 2014 |
| Ramsey Nijem (inactive) | | 5-5-0 | United States | Jul 25, 2015 |
| Borislav Nikolic | Zombee | 1-0-0 | Serbia | Aug 1, 2026 |
| Jack Nilson (inactive) | | 1-1-0 | Unknown | May 30, 1997 |
| Mats Nilsson (inactive) | | 0-2-0 | United States | Jan 3, 2015 |
| Guangyou Ning (inactive) | Smasher | 2-2-0 | Unknown | Nov 26, 2016 |
| Anthony Njokuani (inactive) | The Assassin | 3-5-0 | United States | Oct 4, 2014 |
| Chidi Njokuani | Bang Bang | 6-5-0 | United States | Aug 15, 2026 |
| Derrick Noble (inactive) | The Eraser | 0-1-0 | United States | Apr 15, 2006 |
| Pedro Nobre (inactive) | The Rock | 0-0-0 (1 NC) | Brazil | Jan 19, 2013 |
| Antonio Rodrigo Nogueira (inactive) | Minotauro | 5-6-0 | Unknown | Aug 1, 2015 |
| Rogerio Nogueira (inactive) | Minotouro | 6-7-0 | Unknown | Jul 25, 2020 |
| Kyle Noke (inactive) | | 6-6-0 | Australia | Nov 26, 2016 |
| Eric Nolan | Night Time | 1-2-0 | United States | Oct 3, 2026 |
| Tom Nolan | Big Train | 5-1-0 | Australia | Jun 6, 2026 |
| KJ Noons (inactive) | King | 2-3-0 (1 NC) | United States | Feb 6, 2016 |
| Sage Northcutt (inactive) | Super | 6-2-0 | United States | Jul 14, 2018 |
| Jason Novelli (inactive) | Flipside | 0-2-0 | United States | Nov 5, 2016 |
| Phillipe Nover (inactive) | The Filipino Assassin | 1-6-0 | United States | Feb 11, 2017 |
| Taiyilake Nueraji | Super Saiyan | 1-0-0 | China | Aug 23, 2025 |
| Shayilan Nuerdanbieke (inactive) | Wolverine | 3-3-0 | China | Jun 15, 2024 |
| Amanda Nunes | The Lioness | 16-2-0 | Brazil | Jun 10, 2023 |
| Diego Nunes (inactive) | The Gun | 3-3-0 | Brazil | Jan 19, 2013 |
| Istela Nunes (inactive) | | 0-5-0 | Brazil | Apr 5, 2025 |
| Josiane Nunes | Josi | 3-3-0 | Brazil | Mar 15, 2025 |
| Nina Nunes (inactive) | | 5-4-0 | United States | Aug 13, 2022 |
| Diyar Nurgozhay | | 2-2-0 | Kazakhstan | Aug 8, 2026 |
| Abubakar Nurmagomedov | | 2-2-0 | Russia | Jun 3, 2023 |
| Khabib Nurmagomedov (inactive) | The Eagle | 13-0-0 | Russia | Oct 24, 2020 |
| Said Nurmagomedov | | 7-4-0 | Russia | Jul 26, 2025 |
| Umar Nurmagomedov | | 8-2-0 | Russia | Aug 29, 2026 |
| Francesco Nuzzi | Berserker | 1-0-0 | Italy | Aug 29, 2026 |
| Kennedy Nzechukwu | Chosen | 8-7-1 | United States | Aug 22, 2026 |