Cyrille-Émile Vaillancourt (March 20, 1848 - June 7, 1912) was a physician and political figure in Quebec. He represented Dorchester in the House of Commons of Canada from 1891 to 1896 as a Nationalist member.
He was born in Saint-Roch, Canada East. In 1872, he married Marie-Louise Larochelle. He set up practice at Saint-Anselme in 1873 and later served as mayor and then registrar for Dorchester County.[1] Vaillancourt ran unsuccessfully for reelection to the House of Commons in 1896 and 1904.
His son Cyrille later served in the Canadian senate.