John Ciaccia (March 4, 1933 – August 7, 2018) was a Canadian politician who was provincial cabinet minister from Montreal, Quebec. Ciaccia served as a member of Quebec’s National Assembly from 1973 to 1998, representing the Mount Royal riding for the Quebec Liberal Party. He occupied various posts in the cabinets of Liberal premiers Robert Bourassa, and Daniel Johnson Jr, such as minister of Energy and Natural Resources, International Affairs, Native Affairs, and Immigration and Cultural Communities. At the time of his resignation, Ciaccia was the longest serving member of the Assembly. Ciaccia gained international attention for his efforts in negotiating the end of the Oka Crisis alongside his federal counterpart Tom Siddon in 1990. Former Quebec Premier, Jean Charest described Ciaccia's political career as having, "...revolutionized relations with the native people and cultural communities of Quebec by always favouring an approach marked by respect."