François-Sévère Lesieur Désaulniers (September 19, 1850 – January 29, 1913) was a politician in the province of Quebec, Canada.
Désaulniers was elected as a Conservative candidate to the Legislative Assembly of Quebec in 1878, representing the district of Saint-Maurice.
He was succeeded by law practice partner Nérée Le Noblet Duplessis and moved to federal politics.
He was elected as a Conservative candidate to the House of Commons of Canada in 1887, representing the district of Saint-Maurice.
This article about a Quebec Member of Parliament from the Conservative Party of Canada (1867–1942) is a stub.