Mixed martial arts champions come in all sizes -- from heavyweights up to 265 pound, to atomweights at 105 pounds. They come from all around the world -- from Australia to Brazil to Cleveland to Dagestan. They fight for organizations ranging from the UFC, the biggest fight promotion in the world, to Bellator and the PFL, as well as Asian powerhouse One Championship and Japan's Rizin, and the all-women fight organization Invicta FC.
Here are the champions from all of those promotions.
Click here for a look at the current and all-time UFC champions.
To keep up with current fights, go to the MMA schedule page.
HEAVYWEIGHT (265 pounds and under)
UFC: Tom Aspinall
PFL: Vadim Nemkov
One: Oumar Kane
LIGHT HEAVYWEIGHT (205)
UFC: Carlos Ulberg
PFL: Corey Anderson
One: Anatoly Malykhin (225 pounds)
Rizin: Vacant
MIDDLEWEIGHT (185)
UFC: Khamzat Chimaev
PFL: Costello van Steenis
One: Anatoly Malykhin (205 pounds)
WELTERWEIGHT (170)
UFC: Islam Makhachev
PFL: Vacant
One: Christian Lee (185 pounds)
LIGHTWEIGHT (155)
UFC: Ilia Topuria
PFL: Usman Nurmagomedov
One: Christian Lee (170 pounds)
Rizin: Ilkhom Nozimov
MEN'S FEATHERWEIGHT (145)
UFC: Alexander Volkanovski
One: Tang Kai (155 pounds)
Rizin: Razhabali Shaydullaev
MEN'S BANTAMWEIGHT (135)
UFC: Petr Yan
One: Enkh-Orgil Baatarkhuu (145 pounds)
Rizin: Danny Sabatello
MEN'S FLYWEIGHT (125)
UFC: Joshua Van
One: Yuya Wakamatsu (135 pounds)
Rizin: Hiromasa Ougikubo
MEN'S STRAWWEIGHT (115)
One: Joshua Pacio (125 pounds)
WOMEN'S FEATHERWEIGHT (145)
PFL: Cris Cyborg
Invicta: Vacant
WOMEN'S BANTAMWEIGHT (135)
UFC: Kayla Harrison
Invicta: Jennifer Maia
WOMEN'S FLYWEIGHT (125)
UFC: Valentina Shevchenko
Invicta: Vacant
WOMEN'S STRAWWEIGHT (115)
UFC: Mackenzie Dern
One: Xiong Jing Nan (125 pounds)
Invicta: Vacant
SUPER ATOMWEIGHT (108)
Rizin: Seika Izawa
ATOMWEIGHT (105)
One: Denice Zamboanga (115 pounds)
Invicta: Elisandra Ferreira
