List of Famous people born in Ontario, Canada

Nathaniel Branden was a Canadian–American psychotherapist and writer known for his work in the psychology of self-esteem. A former associate and romantic partner of Ayn Rand, Branden also played a prominent role in the 1960s in promoting Rand's philosophy, Objectivism. Rand and Branden split acrimoniously in 1968, after which Branden focused on developing his own psychological theories and modes of therapy.

Sir Hugh John Macdonald, was the only surviving son of the first Prime Minister of Canada, Sir John A. Macdonald. He too was a politician, serving as a member of the House of Commons of Canada and a federal cabinet minister, and briefly as the eighth Premier of Manitoba.

Nicole Lyn Oliver is a Canadian actress. She is best known for her roles as Princess Celestia and Cheerilee in My Little Pony: Friendship Is Magic and Zoe Trent in Littlest Pet Shop.

Rainbow Sun Francks is a Canadian actor known for his role as Lt. Aiden Ford in the television show Stargate Atlantis, and his recurring roles on The Listener, The Umbrella Academy and High Fidelity.

Bruce Fogle, is a veterinarian and prolific author of pet care books and travel narratives. Canadian by birth, he has lived and worked in London for over 40 years.

Marian Ruth Engel was a Canadian novelist and a founding member of the Writers' Union of Canada. Her most famous and controversial novel was Bear (1976), a tale of erotic love between a librarian and a bear.

Monique Kavelaars is a Canadian fencer. She was part of Team Canada's women's epée team who finished fourth at the 2004 Summer Olympics in Athens, Greece. She trains and lives in Toronto, Ontario. She belongs to the Toronto Fencing Club.

Edward Samuel Rogers III is a Canadian businessman. As of 2018, he is the chairman of Rogers Communications. He is also chairman of the Rogers Control Trust, which controls the majority of the voting shares of Rogers Communications.