Combattants Etats-Unis
| 1876 |  | Nick Thompson | 1-1-0 UFC | #4389 |  |
| 1877 |  | Nick Urso | 0-1-0 REC | #6605 | |
| 1878 |  | Nik Lentz | 14-9-1, 1NC UFC | #359 | |
| 1879 |  | Niko Price | 8-11-0, 2NC UFC | #705 | |
| 1880 |  | Nikol Aguirre | 0-1-0 REC | #5720 | |
| 1881 |  | Nina Nunes | 5-4-0 UFC | #1997 | |
| 1882 |  | Nissen Osterneck | 0-1-0 UFC | #6652 | |
| 1883 |  | Noah Bey | 3-2-0 REC | #344 | |
| 1884 |  | Noah Gasho | 3-0-0 REC | #730 | |
| 1885 |  | Noah Lindsey | 0-1-0 REC | #7203 | |
| 1886 |  | Noe Hernandez | 0-1-0 UFC | #5180 | |
| 1887 |  | Nohelin Hernandez | 0-2-0 UFC | #6367 | |
| 1888 |  | Nolan Linebaugh | 1-0-0 REC | #2666 | |
| 1889 |  | Nolan Ticman | 0-2-0 UFC | #5479 | |
| 1890 |  | Noufel El Kasri | #7632 | | |
| 1891 |  | Nyle Bartling | 0-1-0 REC | #6220 | |
| 1892 |  | Ode Osbourne | 5-7-0, 1NC UFC | #937 | |
| 1893 |  | Olivia Hendrickson | 1-0-0 REC | #4945 | |
| 1894 |  | Olivia Parker | 0-1-0 REC | #5136 | |
| 1895 |  | Oluwale Bamgbose | 1-4-0 UFC | #3550 | |
| 1896 |  | Omoyele Gonzalez | 0-1-0 REC | #5654 | |
| 1897 |  | Orion Cosce | 1-2-0 UFC | #3963 | |
| 1898 |  | Orlando Sanders | 0-1-0 REC | #7378 | |
| 1899 |  | Oscar Jurado Sanchez | 1-0-0 REC | #1056 | |
| 1900 |  | Oseyiomon Oiyemhonlan | 1-2-0 REC | #4586 | |