| William-Pierre Grant | |
| Predecessor: | Bruno Bordeleau |
| Successor: | Ulphée-Wilbrod Rousseau |
| Term Start: | 1925 |
| Term End: | 1935 |
| Birth Date: | 3 June 1872 |
| Birth Place: | Saint-François-Xavier-de-Chicoutimi, Quebec |
| Death Place: | Batiscan, Quebec |
| Party: | Liberal |
William-Pierre Grant (June 3, 1872 - August 25, 1943) was a politician Quebec, Canada and a Member of the Legislative Assembly of Quebec (MLA).
He was born on June 3, 1872, in Chicoutimi, Saguenay–Lac-Saint-Jean. He made career in the lumber industry.
Grant won a by-election as a Liberal candidate in the district of in the provincial district of Champlain in 1925. He was re-elected in 1927 and 1931.
He did not run for re-election in 1935. He was succeeded by Ulphée-Wilbrod Rousseau of the Action libérale nationale.
He died on August 25, 1943, in Batiscan, Mauricie.