| William Tremblay | |
| Office: | Member of the Legislative Assembly of Quebec for Maisonneuve |
| Predecessor: | Jean-Marie Pellerin |
| Successor: | Charles-Joseph Arcand |
| Term Start: | 1927 |
| Term End: | 1931 |
| Successor2: | Joseph-Georges Caron |
| Term Start2: | 1935 |
| Term End2: | 1939 |
| Birth Date: | 10 August 1877 |
| Birth Place: | Chicoutimi, Quebec |
| Death Place: | Montreal, Quebec |
William Tremblay (August 10, 1877 - November 15, 1973) was a politician in Quebec, Canada and a Member of the Legislative Assembly of Quebec (MLA).
He was born on August 10, 1877, in Chicoutimi.
Tremblay ran as a Labour candidate in the district of Maisonneuve in the 1925 federal election and finished a distant third against Liberal incumbent Clément Robitaille.
He ran as a Labor candidate in the district of Maisonneuve in the 1927 provincial election and won. He finished a distant third in the 1931 election and was defeated by Liberal candidate Charles-Joseph Arcand.
Tremblay was re-elected as a Conservative candidate in the 1935 election. He joined Maurice Duplessis's Union Nationale and was re-elected in the 1936 election.
He served as Minister of Labour from 1936 until the 1939 election, when he was defeated by Liberal incumbent Joseph-Georges Caron.
Tremblay ran as a Progressive Conservative candidate in the district of Maisonneuve—Rosemont in the 1945 federal election. He finished third against Liberal candidate Sarto Fournier.
He died on November 15, 1973.