Diane Bellemare (born October 13, 1949) is a Canadian economist and parliamentarian from Quebec, who was appointed to the Senate of Canada on September 6, 2012. From September 2003 to April 2007, she held executive jobs with the Conseil du patronat du Québec, including Senior Vice-President and Chief Economist from April 2006 to April 2007. On November 14, 2019, on the same day that the Senate Liberal Caucus dissolved and was succeeded by the Progressive Senate Group, Senator Bellemare left her position and joined the ISG.