| Louis-Joseph Labrosse | |
| Office1: | Ontario MPP |
| Term Start1: | 1905 |
| Term End1: | 1908 |
| Predecessor1: | Alfred Évanturel |
| Successor1: | Georges Pharand |
| Constituency1: | Prescott |
| Party: | Liberal |
| Birth Date: | 20 June 1872 |
| Birth Place: | St. Eugene, Ontario, Canada |
| Occupation: | Notary |
Louis-Joseph Labrosse (June 20, 1872 - April 7, 1958) was an Ontario notary and political figure. He represented Prescott in the Legislative Assembly of Ontario from 1905 to 1908.[1]
He was born in 1872 in St. Eugene, the son of Simon Labrosse. Labrosse was educated in Montreal and at the Ottawa Business College.[2] In 1892, he married Yvonne Bourque. He served as postmaster at St. Eugene. He defeated François-Eugène-Alfred Évanturel to win the Prescott seat in 1905; he was defeated by Georges Pharand in 1908.[3] He died in 1958.[4]