Louise Portal (born May 12, 1950) is a Canadian actress, film director, singer and writer. She won the Genie Award for Best Supporting Actress for her role in the film The Decline of the American Empire, and was a nominee for Best Actress for Sous-sol (Not Me!).

Her other film roles have included Full Blast, Séraphin: Heart of Stone (Séraphin: un homme et son péché), The Barbarian Invasions (Les Invasions barbares), The Five of Us (Elles étaient cinq), The Happiness of Others (Le Bonheur des autres), Adrien (Le Garagiste), Paul à Québec, The Orphan Muses (Les Muses orphelines), Les Salopes, or the Naturally Wanton Pleasure of Skin and Cordélia.