Kajan Johnson is a retired Canadian mixed martial artist who most recently competed in the lightweight division of the UFC. A professional competitor since 2002, he is also known for competing The Ultimate Fighter Nations: Canada vs. Australia for Team Canada, as well as the MFC and King of the Cage.

The Ultimate Fighter Nations: Canada vs. Australia is an installment of the Ultimate Fighting Championship (UFC)-produced reality television series The Ultimate Fighter. It is the fifth series produced outside the United States and the first filmed in Canada.