Joaquin Churchill Martinez (born 17 October 2002) is a Chilean taekwondo practitioner.

He was a silver medalist at the 2023 Pan American Games and competed at the 2024 Summer Olympics.

He is a member of Areté Sports Club and studied Physical Education at Andrés Bello University.

[2][3] He won bronze in the 74kg category at the 2021 Pan American Taekwondo Championships in Cancún, Mexico in June 2021.

After recovering from an injury that ruled him out of action for three months, he was a silver medalist at the 2023 Pan American Games in Santiago, in the Men's Kyorugi team.