| Aleksandar Ćosić | |
| Nationality: | Yugoslav |
| Sport: | Sprinting |
| Event: | 4 × 400 metres relay |
| Birth Date: | 19 January 1922 |
Aleksandar Ćosić (born 19 January 1922, date of death unknown) was a Yugoslav sprinter. He competed in the men's 4 × 400 metres relay at the 1948 Summer Olympics.[1]