Robin Pacek (born 17 March 1991) is a Swedish judoka. He competed at the 2016 Summer Olympics in the men's 81 kg event, in which he was eliminated in the second round by Travis Stevens. He also competed in the 2020 Olympics in Tokyo.
Pacek's father Ryszard Pacek was a Polish Greco-Roman wrestler who emigrated to Sweden in the late 1970s. His older brother Martin is also a judoka.