Monique Gagnon-Tremblay is a politician in Quebec, Canada. She was the MNA for the riding of Saint-François in the Estrie region from 1985 to 2012. She served as Liberal leader of the Opposition in the National Assembly of Quebec from May 1998 to December 1998 and Deputy Premier in 1994 and from 2003 to 2005.

The Quebec Liberal Party is a provincial political party in Quebec. It has been independent of the federal Liberal Party of Canada since 1955. The QLP has always been associated with the colour red; each of their main opponents in different eras have been generally associated with the colour blue.