| Marc Tanguay | |
| Office: | Leader of the Opposition of Quebec |
| Premier: | François Legault |
| Term Start: | November 10, 2022 |
| Predecessor: | Dominique Anglade |
| Office1: | Interim Leader of the Quebec Liberal Party |
| Term Start1: | November 10, 2022 |
| Predecessor1: | Dominique Anglade |
| Office2: | Member of the National Assembly of Quebec for LaFontaine |
| Term Start2: | June 11, 2012 |
| Predecessor2: | Tony Tomassi |
| Birth Date: | 18 April 1973 |
| Profession: | Lawyer |
| Party: | Quebec Liberal |
Marc Tanguay (born April 18, 1973) is a Canadian politician and a member of the National Assembly of Quebec for the LaFontaine electoral district.
On September 26, 2009, he was elected president of the Quebec Liberal Party. He is a lawyer by profession, and studied political science at Université Laval and law at Université de Montréal.
He was elected in a by-election held on June 11, 2012, which was triggered by the resignation of Tony Tomassi on May 3, 2012. Prior to that, he was an unsuccessful Liberal candidate in the 2007 general election in Chambly electoral district, finishing third.[1]
On November 10, 2022, he was named interim leader of the Quebec Liberal Party following the resignation of Dominique Anglade.[2] As of September 7, 2024, aside from serving as the Leader of the Opposition, he also serves as critic for Canadian Relations and Canadian Francophonie and Capitale-Nationale.