Gerald Augustine Regan (b. February 13, 1928) is a Canadian politician.

Born in Windsor, Nova Scotia, Gerald Regan graduated from Dalhousie Law School and was admitted to the Nova Scotia Barristers' Society in 1954. He became one of the region's best known labour lawyers and his high-profile image led to an invitation to enter politics. He was first elected to the House of Commons in 1963 before entering provincial politics and being elected leader of the Nova Scotia Liberals in 1965. Regan entered the provincial legislature in 1967 and aggressively persued the government of George Smith as Leader of the opposition leading a fourteen hour filibuster against the government's plans to increase the sales tax in 1969.

Regan's Liberals won a minority government in 1970 and were re-elected with a majority in 1974.

As premier, Regan supported industrialization and the development of offshore gas and oil. His first government amended the province's labour code to prevent courts from issuing injunctions to prevent picketing in labour disputes, and the office of the provincial ombudsman was established. In its second term the Regan government nationalised Nova Scotia Light and Power and consolidated electricity supply under the Nova Scotia Power Corporation. A massive plan for the development of tidal power in the Bay of Fundy was also announced.

His government was defeated by John Buchanan's Progressive Conservatives in 1978 in part due to the oil shock's effect on the economy.

Regan returned to the federal House of Common in the 1980 Canadian election and was appointed minister of labour and minister of state for international trade in the Cabinet of Pierre Trudeau before being defeated in the 1984 Canadian election.

In March 1995 he was charged with 16 counts of sexual offences and ulitmately faced trial for eight sex-related charges for events that allegedly occurred in 1956 and 1969 - he was acquitted only to face more charges in 1999.

His son Geoff Regan was first elected as a Liberal MP in 1993. In 2003 he became Minister of Fisheries and Oceans in the government of Paul Martin.