People who have competed at Australian Brazilian jiu-jitsu and grappling events. Australia only, for now. See Australian BJJ rankings for recorded wins by belt, state, and ruleset.
| Kiyo Goncalves Matsugaki | White | Grappling Bros / GFTeam |
| KJ Fechner | White | Element Australia |
| Kjartan Boyle | White | De Been 100% Jiu Jitsu |
| Klade Hauschildt | White | CAZA BJJ Australia |
| Klara Stivi | Grey | Onya Martial Arts |
| Klay Ferrer | White | Gracie Barra Surfers Paradise |
| Kleanthis Sotiriou | Grey | Team Perosh MMA |
| Kleo Johansson | Grey | Team Lead |
| Kluivert Ngwena | Blue | EQUIPE MESTRE WILSON JIU-JITSU AUSTRALIA |
| Knox Andonopoulos | Grey | woven jiu jitsu |
| Knox Duff | Grey | High Rollers |
| Knox Grey | Unknown belt | DNA MMA |
| Knox Gulino | Grey | DC AUSTRALIA |
| Knox Higginbottom | Grey | Lake Macquarie Jiu-Jitsu |
| Knox Hirst | White | Studio 55 Brazilian Jiu Jitsu |
| Knox Oneill | Grey | Gracie Barra Edgeworth |
| Koa Chesher | Grey | Gracie Barra Shellharbour |
| Koa Da Silva | Grey | Galeb BJJ |
| Koa Doney | White | Gracie Barra Edgeworth |
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