| Léon Jeck | |
| Fullname: | Léon Jeck |
| Birth Date: | 8 February 1947 |
| Birth Place: | Ans, Belgium |
| Death Place: | Seraing, Belgium |
| Position: | Defender |
| Clubs1: | Standard Liège |
| Years1: | 1964–1974 |
| Clubs2: | Union St. Gilloise |
| Years2: | 1974–1975 |
| Clubs3: | US Tellinoise |
| Years3: | 1975–1977 |
Léon Jeck (8 February 1947 – 24 June 2007) was a Belgian international footballer. He was a tough-tackling centre-back for Standard Liège and played against Russia and Mexico in the 1970 World Cup Finals. It was Jeck's tackle that was controversially given as a penalty in the Mexico game that helped the hosts, not Belgium, progress to the next stage. He died on 23 June 2007 at the age of 60 from a pulmonary embolism.[1]