| István Tamássy | |
| Birth Date: | 1911 |
| Birth Place: | Hungary |
| Position: | Forward |
| Clubs1: | Újpest FC |
| Nationalyears1: | 1934 |
| Nationalteam1: | Hungary |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
István Tamássy (1911 - 30 May 1994) was a Hungarian football forward who played for Hungary in the 1934 FIFA World Cup.[1] He also played for Újpest FC.