List of Famous people born in Ontario, Canada

Jonathan Herbert Schaeffer is a Canadian researcher and professor at the University of Alberta and the former Canada Research Chair in Artificial Intelligence.

Philip John Currie is a Canadian palaeontologist and museum curator who helped found the Royal Tyrrell Museum of Palaeontology in Drumheller, Alberta and is now a professor at the University of Alberta in Edmonton. In the 1980s, he became the director of the Canada-China Dinosaur Project, the first cooperative palaeontological partnering between China and the West since the Central Asiatic Expeditions in the 1920s, and helped describe some of the first feathered dinosaurs. He is one of the primary editors of the influential Encyclopedia of Dinosaurs, and his areas of expertise include theropods, the origin of birds, and dinosaurian migration patterns and herding behavior. He was one of the models for palaeontologist Alan Grant in the film Jurassic Park.

Barbara Jean McDougall, was a Canadian politician. She served as a Member of Parliament from 1984 to 1993, and as Secretary of State for External Affairs from 1991 to 1993. She did not run again in the 1993 Canadian federal election which saw the incumbent Progressive Conservative government reduced to two seats in the House of Commons.

Ryan Suzuki is a Canadian professional ice hockey forward currently playing for the Chicago Wolves in the American Hockey League (AHL) as a prospect to the Carolina Hurricanes of the National Hockey League (NHL). He was drafted 28th overall by the Hurricanes in the first round of the 2019 NHL Entry Draft. He is the younger brother of Montreal Canadiens forward Nick Suzuki.

Ben Barzman was a Canadian journalist, screenwriter, and novelist, blacklisted during the McCarthy Era and best known for his screenplays for the films Back to Bataan (1945), El Cid (1961), and The Blue Max (1966).

Sara Botsford is a Canadian television and film actress. She plays Marilla in the 2016 Anne of Green Gables TV movie, opposite Martin Sheen, and plays Lady Covington in the Nickelodeon YTV series RIDE. She is probably best known for her role of Ann Hildebrand in the television series E.N.G. for which she won a Gemini Award for Best Performance by an Actress in a Continuing Leading Dramatic Role. Before this role, her most remembered role is the wickedly evil character of Lillith McKechnie, AKA Isabella, on the daytime drama As the World Turns from 1988 to 1990. In Dangerous Offender: The Marlene Moore Story (1996), she portrayed Marlene Moore's lawyer. In 2002, she portrayed Kathleen Sinclair in the TV movie Trudeau about the life of the late Prime Minister Pierre Elliott Trudeau. In 2003 she appeared in Burn: The Robert Wraight Story.

Harold Barling Town, OC was a Canadian abstract painter. He is best known as a member of Painters Eleven a group of abstract artists active in Toronto from 1954-1960. Town coined the name of the group, which was based simply on the number of artists that were present the first meeting. He also worked as an illustrator, a profession he credited with imparting a sense of discipline that would last throughout his entire artistic career. His early illustrative appeared in magazines such as Maclean's and Mayfair.

Dalton James Patrick McGuinty Jr. is a Canadian retired politician who served as the 24th Premier of Ontario from 2003 to 2013. He was the first Liberal leader to win two majority governments since Mitchell Hepburn nearly 70 years earlier. In 2011, he became the first Liberal premier to secure a third consecutive term since Oliver Mowat (1872–1896), after his party was re-elected in that year's provincial election.

John Edward "Jack" Purcell was a Canadian world champion badminton player. Purcell was the Canadian National Badminton Champion in 1929 and 1930 and declared as world champion in 1933. He retired in 1945, and pursued a career as a stockbroker. Purcell also designed an athletic shoe that bears his name, which is still popular today.

James Hillier, was a Canadian-American scientist and inventor who designed and built, with Albert Prebus, the first successful high-resolution electron microscope in North America in 1938.