Education
Collège Sainte-Marie de Montréal.
politician Member of the National Assembly
Collège Sainte-Marie de Montréal.
Mercier was born in Montreal to Honoré Mercier Junior., Liberal Modern Language Association and cabinet minister and Jeanne Fréchette. He was mayor of Léry, Quebec from 1948 to 1950. He was first elected to the Legislative Assembly in the 1944 Quebec general election for the Quebec Liberal Party.
However, he was defeated in 1948, 1952, and again in 1960.