List of Famous people born in Ontario, Canada

Nonnie Griffin was a Canadian film, stage, television and voice actress. She studied at the Toronto Conservatory in her native land, the Royal Academy of Dramatic Arts in London, and even with famed mime artist Marcel Marceau. Her stage work includes playing Mrs. Rafi in the original Toronto production of The Sea and a 10-month run as the title character in Hello, Dolly! at the Limelight Dinner Theatre in Toronto in 1990. Griffin appeared in the original Toronto production of John Murrell's Waiting for the Parade. She also played Jessica in the original Montreal production of David French's Jitters.

Constance Wilson-Samuel was a Canadian figure skater, born in Toronto, Ontario. Competing in ladies' singles, she became the 1932 World bronze medallist, a four-time North American champion, and a nine-time Canadian national champion. She competed at three Olympics, placing sixth in 1928 and fourth in 1932.

Frank Giustra is a Canadian businessman, mining financier and global philanthropist, who also founded Lionsgate Entertainment. He is CEO of Fiore Group of Companies and co-chair of International Crisis Group. From 2001 to 2007, he was the chairman of the merchant banking firm, Endeavour Financial, which financed mining companies.

Julia Verlyn LaMarsh, was a Canadian politician, lawyer, author and broadcaster. In 1963, she was only the second woman to ever serve as a federal Cabinet Minister. Under Prime Minister Lester Pearson's minority governments of the middle and late 1960s, she helped push through the legislation that created the Canada Pension Plan and Medicare. As Secretary of State, she was in charge of Canada's Centennial celebrations in 1967. After leaving politics in 1968, she wrote three books, and had her own radio show on CBC Radio. She was stricken with pancreatic cancer in 1979 and was given the Order of Canada at her hospital bed. She died a few days short of the 20th anniversary of her first political election victory, in 1980.

Paul Wernick is a Canadian television/movie screenwriter and producer. He is best known for writing the screenplays to the 2016 superhero film Deadpool and its 2018 sequel with his creative partner Rhett Reese.

Jay Silverheels was an Indigenous Canadian actor and athlete. He was well known for his role as Tonto, the Native American companion of the Lone Ranger in the American western television series The Lone Ranger.

Simon St. Quentin Whitfield is a retired Olympic triathlon champion from Canada. Whitfield won 10 consecutive Canadian Triathlon Championships titles and carried the Canadian national flag during the 2000 Summer Olympics closing ceremony in Sydney, where he had won his gold medal, and the opening ceremony at the 2012 Summer Olympics in London, making him one of few Canadian athletes to be honoured twice as Olympic flag bearer.

Michael Snow is a Canadian artist working in a range of media including film, installation, sculpture, photography, and music. His best-known films are Wavelength (1967) and La Région Centrale (1971), with the former regarded as a milestone in avant-garde cinema.

Sterling Rufus Lyon, was a Canadian lawyer, cabinet minister, and the 17th Premier of Manitoba from 1977 to 1981. His government introduced several fiscally-conservative measures, and was sometimes seen as a local version of the government of Margaret Thatcher in the United Kingdom. He also successfully fought for the inclusion of the notwithstanding clause in the Canadian Charter of Rights and Freedoms.