Louis Saia (born Luigi Saia; May 25, 1950 – April 1, 2026) was a Canadian screenwriter and film director, most noted for the Les Boys movie franchise.

He began his career as a theatrical director, becoming best known for the comedic show Broue, co-created with Jean-Pierre Plante, Francine Ruel, Michel Côté, Marcel Gauthier, Marc Messier and Claude Meunier, in the early 1980s. In 1984 they received a Floyd S. Chalmers Canadian Play Award for the show's English translation, Brew. In this era he also wrote film screenplays, including the theatrical films Voyage de nuit and A Childhood Friend (Une amie d'enfance), and the television film Appelez-moi Stéphane, an adaptation of his own earlier stage play.