Christiane Gagnon (born April 16, 1948) is a Canadian politician who served as the Member of Parliament (MP) for the electoral district of Québec from 1993 to 2011.

She was first elected to the House of Commons in the 1993 federal election as the Bloc Québécois candidate in the district of Québec.

She was defeated in the 2011 election by NDP candidate Annick Papillon.

She has also been the Bloc's critic of the Status of Women, the Federal Office of Regional Development-Quebec, Housing, Poverty, Canadian Heritage, the National Capital Commission, and the National Capital Region.

She was a candidate in the 2019 election, which she narrowly lost to the Liberal Party incumbent Jean-Yves Duclos.