| Siegfried Valentin | |
| Nationality: | German |
| Sport: | Middle-distance running |
| Event: | 1500 metres |
| Birth Date: | 23 February 1936 |
| Birth Place: | Wallwitz, Landkreis Guben, Germany |
| Death Date: | [1] |
| Death Place: | Potsdam, Germany |
Siegfried Valentin (23 February 1936 - 17 December 2021)[1] was a German middle-distance runner. He competed in the 1500 metres at the 1960 Summer Olympics and the 1964 Summer Olympics.[2]