Diane Leblanc (born 9 December 1954) is a publicist and politician in Quebec.
She served as a press and PR liaison for several politicians in Beauce-Sud before running for office.
She lost to Action démocratique du Québec candidate Claude Morin in the 2007 Quebec general election.
In 2007, Leblanc opened a consulting firm in public and government relations.
In 2010, she was appointed as Vice-President of the Quebec Labour Standards Commission.