John Danaher (martial artist)

John Danaher (born April 2, 1967) is a US-born New Zealand martial artist. He is a Brazilian jiu-jitsu and mixed martial arts (MMA) instructor and coach. Danaher is widely regarded as one of the best instructors and coaches in these sports.

Danaher holds a 6th-degree black belt in Brazilian jiu-jitsu under Renzo Gracie, and he is a former instructor at the Renzo Gracie Academy in Manhattan. Danaher grew up in New Zealand and arrived in the United States in 1991 to study at Columbia University's philosophy Ph.D. program. After arriving in New York, Danaher was introduced to Brazilian jiu-jitsu by a friend at the university, and began taking classes at the Renzo Gracie Academy in Manhattan. He continued training at the academy and began to teach classes as well while Gracie was traveling for competition. Since receiving his black belt in April 2002, he has been an instructor for several notable jiu-jitsu and mixed martial arts competitors.