1990 Laurier—Sainte-Marie federal by-election

A by-election was held in the federal riding of Laurier—Sainte-Marie in Quebec on August 13, 1990, following the death of Liberal MP Jean-Claude Malépart.

The by-election was held on the same day as another in Oshawa in Ontario. The seat was won by Independent candidate Gilles Duceppe, who later co-founded the Bloc Québécois in February 1991.