| Maurice-Tréflé Custeau | |
| Office: | Member of the Legislative Assembly of Quebec for Montréal–Jeanne-Mance |
| Predecessor: | Jean-Paul Noël |
| Successor: | Aimé Brisson ⋅ |
| Term Start: | 1956 |
| Term End: | 1962 |
| Birth Date: | 10 March 1916 |
| Birth Place: | Montreal, Quebec |
| Death Place: | Montreal, Quebec |
| Party: | Union Nationale |
| Occupation: | Businessman |
Maurice-Tréflé Custeau (March 10, 1916 - August 19, 1990) was a Canadian businessman and politician. He was a Member of the provincial legislature and a city councillor in Montreal, Quebec, Canada.
He was born in Montreal, Quebec, on March 10, 1916 and was a businessman.
Custeau was appointed to the Montreal City Council by the Jeune Chambre de commerce de Montréal (Young Chamber of Commerce) and served from 1950 to 1954.
He successfully ran as a Union Nationale candidate in the district of Montréal–Jeanne-Mance in 1956 and was re-elected in 1960.
He served as Parliamentary Assistant from 1959 to 1960 and briefly as a Minister without Portfolio in 1960.
He lost his bid for re-election in 1962 against Liberal candidate Aimé Brisson.
He also ran in the district of Dorion in 1966, but lost again.
Custeau died on August 19, 1990.