Lucien Grenier (October 11, 1925 – August 3, 1998) was a lawyer and political figure in Quebec, Canada.
He represented Bonaventure in the House of Commons of Canada from 1958 to 1962 as a Progressive Conservative.He was born in Saint-Godefroi, Quebec, the son of Simon Grenier and Marie-G.
Hirard, and was educated at the Séminaire de Gaspé.
Grenier practised law at New Carlisle, Quebec.
He was an unsuccessful candidate for a seat in the Quebec assembly in 1948.
In 1949, he married Pierrette Demers.
Grenier was defeated when he ran for reelection to the House of Commons in 1962 and 1963.