Louis-Rodrigue Masson, PC (baptized Louis-François-Roderick Masson) (6 November 1833 – 8 November 1903) was a Canadian Member of Parliament, Senator, and the fifth Lieutenant Governor of Quebec.

A Conservative, from 1878 to 1880 he served under Sir John A. Macdonald as Minister of Militia and Defence, and in 1880 he was the President of the Privy Council.

From March to October 1884, he was a member of the Legislative Council of Quebec.

He published Les bourgeois de la compagnie du Nord-Ouest (1889).New International Encyclopedia He had been named to the Senate for Mille Isles division in 1882; he resigned his seat when he was named Lieutenant-Governor.

He was the father-in-law of Liberal MP, Emmanuel Berchmans Devlin.