List of Famous people born in Ontario, Canada

Rowan Alexander "RJ" Barrett Jr. is a Canadian professional basketball player for the New York Knicks of the National Basketball Association (NBA). A shooting guard and small forward, he was selected third overall in the 2019 NBA Draft by the New York Knicks after one year with the Duke Blue Devils program under coach Mike Krzyzewski.

Raymond Robert Emery was a Canadian professional ice hockey goaltender who played in the National Hockey League (NHL) for eleven seasons. Emery was chosen 99th overall by the Ottawa Senators in the 2001 NHL Entry Draft. During the 2006–07 season, he was a member of the Senators team that reached the Stanley Cup Finals, the first appearance in the finals for the modern Senators' franchise. He won a Stanley Cup championship with the Chicago Blackhawks in 2013.

Margaret Eleanor Atwood is a Canadian poet, novelist, literary critic, essayist, teacher, environmental activist, and inventor. Since 1961, she has published 18 books of poetry, 18 novels, 11 books of non-fiction, nine collections of short fiction, eight children's books, and two graphic novels, as well as a number of small press editions of both poetry and fiction. Atwood has won numerous awards and honors for her writing, including the Booker Prize (twice), Arthur C. Clarke Award, Governor General's Award, Franz Kafka Prize, Princess of Asturias Awards, and the National Book Critics and PEN Center USA Lifetime Achievement Awards. A number of her works have been adapted for film and television.

Patricia Anne Stratigeas better known by the ring name Trish Stratus, is a Canadian fitness master, fitness model, actress, and professional wrestler. Often regarded as one of the greatest women's performers, she is also one of the most popular superstars in the World Wrestling Entertainment (WWE).

Frank William Dux is a martial artist, fight choreographer and author. According to Dux, a ninjutsu expert named Senzo Tanaka trained him as a ninja when he was a teenager. He established his own school of ninjutsu called Dux Ryu Ninjutsu, and has said he won a secret martial arts tournament called the Kumite in 1975. His alleged victory at the Kumite served as the inspiration for the 1988 film Bloodsport starring Jean-Claude Van Damme. Dux's victory at the Kumite has been disputed, as has the existence of both the Kumite he described and Senzo Tanaka.

Eric James McCormack is a Canadian-American actor and singer known for his role as Will Truman in the American sitcom Will & Grace, Grant MacLaren in Netflix's Travelers and Dr. Daniel Pierce in the American crime drama Perception.

Robert Francis Roode Jr. is a Canadian professional wrestler signed to WWE, where he performs on the SmackDown brand under his real name, Robert Roode. He is one half of the current WWE SmackDown Tag Team Champions with Dolph Ziggler in their first reign.

Patrick Johannes Adams is a Canadian actor and director. He is best known for playing Mike Ross, a college dropout turned unlicensed lawyer in USA Network's TV series Suits. For his role in Suits, Adams was nominated for Outstanding Performance by a Male Actor in a Drama Series at the 18th Screen Actors Guild Awards.

Quinn is a Canadian professional soccer player, who is a midfielder for OL Reign and the Canada women's national soccer team.

Jahron Anthony Brathwaite, known professionally as PartyNextDoor, is a Canadian singer, songwriter, rapper and record producer.