Joshua Katz (born 29 December 1997) is an Australian Olympic judoka, who competes at −60 kg.

Katz was born on 29 December 1997[2] in Baulkham Hills, New South Wales, Australia, to a Jewish family.

[4][2] He also was named the 2010 New South Wales Junior Boy of the Year and received the 2010 Hills Shire Times Young Achiever Award.

[15] Katz competed at the 2016 Rio Olympics in the men's 60 kg event at 18 years of age, months after he finished high school.

[4][22] In November 2022, in a competition he suffered elbow ligament and tendon damage, necessitating surgery, and ending his season.

[23][25] In September 2023, competing in the 2023 Pan American-Oceania Judo Championships in Calgary, Canada, he won a silver medal.

[4][25] On 8 June 2024, winning a silver medal at the 2024 Abidjan African Open in the Ivory Coast, he qualified for the 2024 Olympics.