| Marius Poškus | |
| Fullname: | Marius Poškus |
| Birth Date: | 1970 7, df=yes |
| Birth Place: | Lithuanian SSR, Soviet Union |
| Nationalyears1: | 1991–2000 |
| Nationalteam1: | Lithuania |
| Nationalcaps1: | 16 |
| Nationalgoals1: | 0 |
| Ntupdate: | 23 May 2009 |
Marius Poškus (born 7 July 1970) is a retired Lithuanian international football goalkeeper. He obtained a total number of sixteen caps for the Lithuania national football team. During his professional career he played for several clubs in his native country, including FK Sirijus Klaipėda and FK Inkaras Kaunas .