| István Ilku | |
| Birth Date: | 6 March 1933 |
| Birth Place: | Budapest, Hungary |
| Death Place: | Dorog, Hungary |
| Position: | Goalkeeper |
| Years1: | 1953–1968 |
| Clubs1: | Dorogi FC |
| Caps1: | 404 |
| Goals1: | 1 |
| Nationalyears1: | 1956–1963 |
| Nationalteam1: | Hungary |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 0 |
István Ilku (6 March 1933 – 17 April 2005) was a Hungarian football goalkeeper who played for Hungary in the 1958 and 1962 FIFA World Cups.[1] He also played for Dorogi FC.