Tous les combattants
 | In Soo Hwang | 0-1-0 REC | #4368 |  |
 | Inglesson de Lara | 1-2-0 REC | #3405 |  |
 | Ingrid Silva | 1-0-0 REC | #2331 | |
 | Ioan Harris | 1-3-0 REC | #3059 |  |
 | Ion Cutelaba | 9-10-1 UFC | #226 |  |
 | Ion Surdu | 6-4-0 REC | #317 | |
 | Ion Taburceanu | 0-2-0, 1NC REC | #4339 | |
 | Iony Razafiarison | 1-2-0 REC | #4255 |  |
 | Iras Khizriev | 1-0-0 REC | #2051 |  |
 | Iraskha Khizriev | #7451 | | |
 | Irene Aldana | 8-6-0 UFC | #261 |  |
 | Irgit Oveenchi | 0-1-0 REC | #5972 |  |
 | Irina Alekseeva | 1-3-0 UFC | #2484 | |
 | Iris Marmouset | 0-1-0 REC | #5707 | |
 | Irlaine Gasai | 0-1-0 REC | #7375 | |
 | Irwin Rivera | 1-2-0 UFC | #3859 | |
 | Isa Magomedov | #7600 | | |
 | Isaac Dulgarian | 2-2-0 UFC | #2237 |  |
 | Isaac Muluh | 0-1-0 REC | #3937 |  |
 | Isaac Omeda | 0-0-1 REC | #6079 |  |
 | Isaac Thomson | 0-1-0 UFC | #1136 |  |
 | Isaac Vallie-Flagg | 1-3-0 UFC | #4155 | |
 | Isabela de Padua | 0-1-0 REC | #6759 | |
 | Isabella de Padua | 0-1-0 UFC | #6297 | |
 | Isai Ramos | 1-1-0 REC | #4488 |  |