Oskar Marvik (born 22 November 1995) is a Norwegian Greco-Roman wrestler.

Marvik won a bronze medal in the Greco-Roman 130 kg event at the 2021 World Championships in Oslo and the Greco-Roman 130 kg event at the 2023 European Championships in Zagreb.

[2][3][4][5] Marvik won a bronze medal in the Greco-Roman 130 kg event at the 2021 World Championships in Oslo.

[3] In 2022, he lost his bronze medal match in his event at the Matteo Pellicone Ranking Series 2022 held in Rome.

[7] Marvik won one of the bronze medals in the 130 kg event at the 2023 European Championships held in Zagreb.