List of Famous people born in Ontario, Canada

Elliott Jaques was a Canadian psychoanalyst, social scientist and management consultant known for as originator of concepts such as ‘corporate culture’, ‘mid-life crisis’, ‘fair pay’, ‘maturation curves’, ‘time span of discretion’ and requisite organization, as a total system of managerial organization.

Robert Tibshirani is a professor in the Departments of Statistics and Biomedical Data Science at Stanford University. He was a professor at the University of Toronto from 1985 to 1998. In his work, he develops statistical tools for the analysis of complex datasets, most recently in genomics and proteomics.

David Robert Peterson, is a Canadian former politician. He was the 20th premier of the province of Ontario, Canada, from June 26, 1985, to October 1, 1990. He was the first Liberal premier of Ontario in 42 years.

Ernest Armstrong McCulloch, was a University of Toronto cellular biologist, best known for demonstrating – with James Till – the existence of stem cells.

Fannie Kauffman, who was often known by the stage name Vitola, was a Canadian-born Cuban actress and comedian.

Robert Helmer MacArthur was a Canadian-born American ecologist who made a major impact on many areas of community and population ecology.

Mary Harron is a Canadian filmmaker and screenwriter, and former entertainment critic. She gained recognition for her role in writing and directing several independent films, including I Shot Andy Warhol (1996), American Psycho (2000), and The Notorious Bettie Page (2005). She co-wrote American Psycho and The Notorious Bettie Page with Guinevere Turner.

Martin David Kamen was an American chemist who, together with Sam Ruben, co-discovered the synthesis of the isotope carbon-14 on February 27, 1940, at the University of California Radiation Laboratory, Berkeley.

Jeffrey Wincott is a Canadian actor and martial artist best known for his lead role in the television series Night Heat.

Sean McCann was a Canadian actor and was in the business for over 55 years. He was best known for his roles as Lt. Jim Hogan in the 1985 CBS television drama series Night Heat (1985–1989), Frank Rittenhauer in the comedy film Tommy Boy (1995) and the Judge in Chicago (2002).