| Fighter | Record | Last Bout |
|---|---|---|
| Nicco Montano | 5-3-0 | 2019-07-13 |
| Nicholas Musoke | 13-5-0 (1 NC) | 2017-05-28 |
| Nick Agallar | 24-6-0 | 2003-11-21 |
| Nick Aguirre | 7-2-0 | 2023-11-18 |
| Nick Catone | 10-4-0 | 2014-02-01 |
| Nick Denis | 11-3-0 | 2012-05-05 |
| Nick Diaz | 26-10-0 (2 NC) | 2021-09-25 |
| Nick Fiore | 6-2-0 | 2023-05-20 |
| Nick Hein | 14-5-0 (1 NC) | 2019-06-01 |
| Nick Maximov | 8-2-0 | 2022-10-15 |
| Nick Osipczak | 6-3-0 | 2010-11-13 |
| Nick Pace | 8-3-0 | 2011-11-19 |
| Nick Penner | 11-3-0 | 2012-12-14 |
| Nick Ring | 14-4-0 | 2013-12-06 |
| Nick Roehrick | 7-1-0 | 2017-07-07 |
| Nick Sanzo | 1-1-0 | 1997-02-07 |
| Nick Serra | 7-3-0 | 2002-06-22 |
| Nick Thompson | 38-14-1 | 2006-04-15 |
| Nicolae Negumereanu | 13-2-0 | 2022-11-12 |
| Nik Lentz | 30-12-2 (1 NC) | 2021-01-23 |
| Niklas Backstrom | 11-3-0 (1 NC) | 2015-06-20 |
| Niklas Stolze | 12-6-0 | 2022-06-04 |
| Nina Nunes | 11-7-0 | 2022-08-13 |
| Nissen Osterneck | 12-4-0 | 2009-04-01 |
| Noad Lahat | 11-2-0 | 2016-02-06 |
| Noe Hernandez | 5-5-0 | 1998-05-15 |
| Nohelin Hernandez | 9-4-0 | 2019-09-28 |
| Nolan Ticman | 4-3-0 | 2015-05-16 |
| Nordine Taleb | 15-7-0 | 2019-09-07 |
| Norifumi Yamamoto | 18-6-0 (2 NC) | 2015-02-28 |
| Norman Parke | 23-6-1 | 2016-02-27 |
| Pedro Nobre | 18-4-2 (1 NC) | 2013-01-19 |
| Phillipe Nover | 11-8-1 | 2017-02-11 |
| Rafael Natal | 21-9-1 | 2017-07-22 |
| Ramsey Nijem | 9-6-0 | 2015-07-25 |
| Reza Nasri | 0-1-0 | 1996-09-20 |
| Rin Nakai | 19-2-1 | 2016-03-19 |
| Roger Narvaez | 8-3-0 | 2015-03-14 |
| Rogerio Nogueira | 23-10-0 | 2020-07-25 |
| Roy Nelson | 22-14-0 | 2017-04-15 |
| Sage Northcutt | 11-2-0 | 2018-07-14 |
| Shane Nelson | 16-7-0 | 2009-12-12 |
| Shayilan Nuerdanbieke | 39-12-0 | 2024-06-15 |
| Stanislav Nedkov | 12-2-0 (1 NC) | 2015-01-24 |
| Steve Nelmark | 2-1-0 | 1996-12-07 |
| Tafon Nchukwi | 6-4-0 | 2023-08-12 |
| Tom Niinimaki | 22-8-1 | 2014-12-20 |
| Tyson Nam | 21-14-1 | 2023-07-15 |
| Yui Chul Nam | 18-8-1 | 2015-11-28 |