Gérald Tremblay (1942- ) is a Canadian (Quebecois) politician and the mayor of the city of Montreal. He came into power in Montreal after a particularly debatable merging of the towns that made up the MUC (Montreal Urban Community) into the megacity caused his rival to lose voter confidence. His election campaign was based on re-evaluating the merger.

Since he took office, he has streamlined the city's operations but generally keeps to himself. He is known for avoiding the media, but still enjoys a high popularity. Before becoming mayor he had a long career in business and in politics.

He was admitted to the Québec Bar in 1970 and later received an MBA from the Harvard Business School. He was in senior management in several financial institutions in Québec until 1989, when he was elected to the National Assembly and served as Minister of Industry, Commerce, Science and Technology til 1994, in the government of Robert Bourassa.

From about 1994 to his election as mayor in 2001, he was a successful entrepreneur, setting up a chain of specialty boutiques called Dans un Jardin which sold mostly perfume, but also jam, and a few other minute delicacies which come in small tins or bottles. He was also on the board of directors of several corporations.