| Gustave Lemieux | |
| Parliament: | Canadian |
| Office: | Member of the Legislative Assembly of Quebec for Gaspé |
| Predecessor: | Joseph-Léonide Perron |
| Successor: | District was abolished in 1931 |
| Term Start: | 1912 |
| Term End: | 1931 |
| Office2: | Member of the Legislative Council of Quebec for Montarville |
| Predecessor2: | Narcisse Pérodeau |
| Successor2: | Émile Lesage |
| Term Start2: | 1932 |
| Term End2: | 1956 |
| Birth Date: | 19 December 1864 |
| Birth Place: | Montreal, Canada East |
| Death Place: | Montreal, Quebec |
| Party: | Liberal |
Gustave Lemieux (19 December 1864 - 19 July 1956) was a Canadian politician.
Born in Montreal, Canada East, Lemieux was acclaimed to the Legislative Assembly of Quebec for Gaspéin 1912. A Liberal, he was re-elected in 1916, 1919, 1923, and 1927. He was appointed to the Legislative Council of Quebec for Montarville in 1932 and served until his death in 1956.
His brothers, Louis-Joseph Lemieux and Rodolphe Lemieux, were both politicians.