Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| NC | Nora Cornolle | |
| NT | Nordine Taleb | |
| NY | Norifumi Yamamoto | "Kid" |
| ND | Norma Dumont | "The Immortal" |
| NP | Norman Parke | "Stormin'" |
| NR | Nursulton Ruziboev | "Black" |
| NA | Nurullo Aliev | "Tajik Eagle" |
| NT |
| Nyamjargal Tumendemberel |
| "Art of Knockout" |
| OE | Oban Elliott | "The Welsh Gangster" |
| OO | Ode Osbourne | "The Jamaican Sensation" |