| Stefan Ołdak | |
| Nationality: | Polish |
| Sport: | Sprinting |
| Event: | 400 metres |
| Birth Date: | 5 November 1904 |
| Birth Place: | Warsaw, Russian Empire |
| Death Place: | Warsaw, Poland |
Stefan Ołdak (5 November 1904 - 20 October 1969) was a Polish sprinter.[1] He competed in the men's 400 metres at the 1924 Summer Olympics.[2]