Robert James Manion was a Canadian politician who led the Conservative Party of Canada from 1938 to 1940. Prior to his leadership of the party, he served in Prime Minister Arthur Meighen and R. B. Bennett's cabinets.

The Conservative Party of Canada was a major federal political party in Canada that existed from 1867 to 1942. The party adhered to traditionalist conservatism and its main policies included strengthening relations with Great Britain, nationalizing industries, and promoting high tariffs.