Justin Karn (born June 16, 1981) is a Canadian judoka who represented Canada in Judo at the 2012 Paralympics in the -60 kg category.

He was eliminated from the tournament in repêchage due to disqualification by penalties (four shido leading to hansoku make) in his match against South Korea's Min-Jae Lee.

[3] Karn has been competing in Judo for around 18 years, and in 2011 won bronze in the -60 kg category of the Parapan American Games.

[1] He was born with aniridia, an eye condition that left him without irises, and also has astigmatism and mutated corneas in both eyes.

This biographical article related to Judo in Canada is a stub.