| Pierre Legrain | |
| Nationality: | French |
| Sport: | Athletics |
| Event: | Hammer throw |
| Birth Date: | 18 February 1920 |
| Birth Place: | La Neuville, France |
| Death Place: | Thumeries, France |
Pierre Legrain (18 February 1920 - 20 June 2005) was a French athlete. He competed in the men's hammer throw at the 1948 Summer Olympics and the 1952 Summer Olympics.[1]