He was born in Trois-Rivières, Quebec and became a lawyer The son of Georges Méthot and E. Rousseau, he was educated at the Séminaire de Trois-Rivières and the Université Laval, was called to the Quebec bar in 1919 and practised in Trois-Rivièresearch
In 1929, he was named King"s Counsel. Méthot made attempts to gain a Canadian House of Commons seat at the Three Rivers riding, first as a Conservative in the 1935 election then as a Progressive Conservative in the 1945 election. He was unsuccessful with both these campaigns.
He was appointed to the Senate for the Shawinegan, Quebec division on 12 October 1957 following nomination by Prime Minister John Diefenbaker.
Méthot remained in that role until his death on 6 August 1972.
