| István Klimek | |
| Fullname: | István Klimek |
| Birth Date: | 15 April 1913 |
| Birth Place: | Austria-Hungary |
| Death Date: | 12 November 1988 (aged 75) |
| Years1: | 1928–1929 |
| Clubs1: | CA Timișoara |
| Years2: | 1931–1936 |
| Clubs2: | ILSA Timișoara |
| Years3: | 1936–1939 |
| Clubs3: | Chinezul Timișoara |
| Caps3: | 29 |
| Goals3: | 21 |
| Years4: | 1940–1941 |
| Clubs4: | Rapid Timişoara |
| Nationalyears1: | 1935 |
| Nationalteam1: | Romania |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
István Klimek (also written as Stefan Climek; 15 April 1913 – 12 November 1988), was a Romanian international footballer of Hungarian origin who played as a striker.[1]
While playing for the Romanian club ILSA Timişoara, he was selected to play for the Romania national football team by joint coaches Josef Uridil and Costel Rădulescu to play at the 1934 World Cup in Italy. The team were eliminated in the first round by Czechoslovakia, losing 2–1.