The Social-National Party (French: Parti social-national, PSN) was a political party in France founded in 1933 by Jean Hennessy, a former cabinet minister. Hennessy, elected deputy for Nice in the Alpes-Maritimes was rarely active in the Independent Left parliamentary group. However, Hennessy was part of The Vichy 80 in 1940 which refused to give full powers to Marshal Philippe Pétain