| Aleksander Bielaczyc | |
| Nationality: | Polish |
| Sport: | Sailing |
| Birth Date: | 23 March 1947 |
| Birth Place: | Gdańsk, Poland |
| Death Place: | Bremen, Germany |
Aleksander Bielaczyc (23 March 1947 - 30 August 1978) was a Polish sailor. He competed in the Dragon event at the 1972 Summer Olympics.[1]