List of Famous people born in Ontario, Canada

Major-General Sir Casimir Cartwright van Straubenzee was a Canadian officer in the British Army ; GOC Singapore and Malaya Command. In 1900, he played cricket for Canada.

Joseph James Guillaume Paul Martin,, often referred to as Paul Martin Sr., was a noted Canadian politician and diplomat. He was the father of Paul Martin, who served as 21st Prime Minister of Canada from 2003 to 2006.

Leila Bronia Josefowicz is an American-Canadian classical violinist.

Irving Kaplansky was a mathematician, college professor, author, and musician.

Ingrid Kavelaars is a Canadian actress known for her role on the science-fiction series Code Name: Eternity.

John Roger Spottiswoode is a Canadian-British director, editor and writer of film and television.

Barbara Lee Keyfitz is a Canadian-American mathematician, the Dr. Charles Saltzer Professor of Mathematics at Ohio State University. In her research, she studies nonlinear partial differential equations and associated conservation laws.

Rosie Shuster is a Canadian-born comedy writer and actress. She was a writer for Saturday Night Live during the 1970s and 1980s.

Gabriel Hogan is a Canadian actor. He is best known for his continuing roles on Canadian hit dramas Heartland, Traders and The Associates.

David William Thomas is a Canadian comedian, actor and television writer. He is best known for being one half of the duo Bob and Doug McKenzie with Rick Moranis. He appeared as Doug McKenzie on SCTV, for which he won a Primetime Emmy Award out of two nominations, and in the film Strange Brew (1983), which he also co-directed. As a duo, they made two albums, The Great White North and Strange Brew, the former gaining them a Grammy Award nomination and a Juno Award.