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Onésime Gagnon, PC (October 23, 1888 – September 30, 1961) was a Canadian politician who served as the 20th Lieutenant Governor of Québec.

The Hon.

Onésime Gagnon
Onésime Gagnon.png
20th Lieutenant Governor of Quebec
In office
February 14, 1958 – September 30, 1961
MonarchElizabeth II
Governor GeneralVincent Massey
Georges Vanier
PremierMaurice Duplessis
Paul Sauvé
Antonio Barrette
Jean Lesage
Preceded byGaspard Fauteux
Succeeded byPaul Comtois
Member of the Legislative Assembly of Quebec for Matane
In office
August 17, 1936 – February 14, 1958
Preceded byJoseph-Arthur Bergeron
Succeeded byBenoît Gaboury
Member of the Canadian Parliament
for Dorchester
In office
July 28, 1930 – October 14, 1935
Preceded byLucien Cannon
Succeeded byLéonard Tremblay
Personal details
Born(1888-10-23)October 23, 1888
Saint-Léon-de-Standon, Quebec
DiedSeptember 30, 1961(1961-09-30) (aged 72)
Bois-de-Coulonge, Sillery, Quebec
Political partyFederal:
Union nationale
Minister Without Portfolio (1935)
Minister of Mines, Game and Fisheries (1936)
Minister of Mines and Fisheries (1936–1939)
Provincial Treasurer (1944–1958)



He was born in Saint-Léon-de-Standon, Quebec on October 23, 1888 and was the son of Onésime Gagnon and Julie Morin. He was a Rhodes scholar and was called to the Quebec Bar in 1912. From 1942 to 1958, he was a Professor in the Faculty of Law at Université Laval.

Member of ParliamentEdit

In 1930, he was elected to the House of Commons of Canada for the riding of Dorchester. A Conservative, he was re-elected in 1935. In 1935, he was a Minister without Portfolio in the cabinet of R. B. Bennett.

Provincial politicsEdit

Gagnon was a leadership candidate at the Conservative Party of Quebec convention, held in Sherbrooke on October 4 and 5, 1933. He was defeated by Maurice Duplessis with 28% of the delegates.

In 1936, he was elected to the Legislative Assembly of Quebec and became the Union Nationale Member for the riding of Matane. He was appointed Minister in the Cabinet of Maurice Duplessis, serving as Minister of Fisheries from 1936 to 1939 and as Treasurer from 1944 to 1958.

He was re-elected in 1939, 1944, 1948, 1952, and 1956.

Lieutenant governorEdit

He resigned in 1958 to accept the office of Lieutenant-Governor of Quebec and served until his death.


Gagnon died on September 30, 1961.


  • Onésime Gagnon – Parliament of Canada biography
  • "Biography". Dictionnaire des parlementaires du Québec de 1792 à nos jours (in French). National Assembly of Quebec.