Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| ID | Isabela de Padua | "Belinha" |
| ID | Islam Dulatov | "The Ripper" |
| IM | Islam Makhachev | |
| IB | Ismael Bonfim | "Marreta" |
| IN | Ismail Naurdiev | |
| IA | Israel Adesanya | "The Last Stylebender" |
| IT | Issei Tamura | |
| IN | Istela Nunes | |
| IA | Iuri Alcantara | "Marajo" |
| IE | Ivan Erslan |