| Marius Cozmiuc | |
| Fullname: | Marius Vasile Cozmiuc |
| Birth Date: | 7 September 1992[1] |
| Birth Place: | Suceava, Romania |
| Spouse: | Ionela-Livia Cozmiuc |
| Height: | 198 cm |
| Alma Mater: | Valahia University of Târgoviște |
| Sport: | Rowing |
| Club: | CS Dinamo Bucuresti |
| Coach: | Antonio Colamonici Dorin Alupei |
| Show-Medals: | yes |
Marius Vasile Cozmiuc (born 7 September 1992) is a Romanian rower. A 2022 World Champion in the coxless pair, Cozmiuc competed in a coxless four at the 2016 Summer Olympics[2] and won a silver medal in the coxless pair at Tokyo 2020. He married fellow Olympic rower Ionela-Livia Cozmiuc in 2017.[3]