| Pierre Gallien | |
| Fullname: | Pierre Gallien |
| Birth Date: | 19 November 1911 |
| Birth Place: | Paris, France |
| Death Place: | Barcelona, Spain |
| Discipline: | Road |
| Role: | Rider |
| Majorwins: | One stage 1939 Tour de France |
Pierre Gallien (19 November 1911 – 28 May 2009) was a French professional road bicycle racer, who won one stage in the 1939 Tour de France. He was born in Paris.