| Joseph Mostert | |
| Nationality: | Belgian |
| Sport: | Middle-distance running |
| Event: | 1500 metres |
| Birth Date: | 26 July 1912 |
Joseph Mostert (26 July 1912 - 28 April 1967) was a Belgian middle-distance runner. He competed in the men's 1500 metres at the 1936 Summer Olympics.[1]