List of Famous people born in Ontario, Canada

Denis Joseph "D. J." Smith is a Canadian professional ice hockey coach and former player. He is the current head coach of the Ottawa Senators of the National Hockey League (NHL). As a player, Smith played 45 NHL games with the Toronto Maple Leafs and Colorado Avalanche. As a coach, Smith won the Memorial Cup in 2015, and spent four years as an assistant with the Maple Leafs before joining Ottawa.

Jack Leonard Warner was a Canadian-American film executive who was the president and driving force behind the Warner Bros. Studios in Burbank, California. Warner's career spanned some 45 years, its duration surpassing that of any other of the seminal Hollywood studio moguls.

Danny Moir is a Canadian former competitive ice dancer. He competed for most of his career with his cousin Sheri Moir. They are the 2001 Canadian national junior silver medalists and placed 11th at the 2001 World Junior Championships. They competed for two seasons on the Junior Grand Prix and placed 11th at the 2001 Nebelhorn Trophy. After that partnership ended, Moir competed with Kristina Lenko in the 2002-2003 season.

Arnold Chan was a Canadian lawyer and politician, who was elected to represent the riding of Scarborough—Agincourt in the House of Commons of Canada in the 2014 by-election. Chan was a member of the Liberal Party of Canada.

Alysha Newman is a Canadian track and field athlete specialized in pole vault. She is the reigning Commonwealth Games champion in the women's pole vault following the 2018 Games in the Gold Coast, where she set a new Games record of 4.75 metres (15.6 ft).

Oshae Jahve Brissett is a Canadian professional basketball player for the Indiana Pacers of the National Basketball Association (NBA). He played college basketball for the Syracuse Orange.

Michael Anthony Cammalleri is a Canadian former professional ice hockey player who played 15 seasons in the National Hockey League (NHL) for five different teams. He was selected in the second round, 49th overall, by the Los Angeles Kings at the 2001 NHL Entry Draft.

Matthew Bryan Martin is a Canadian professional ice hockey winger for the New York Islanders of the National Hockey League (NHL). Martin is known for his strong checking abilities. Martin also holds the NHL record for most hits in a season. In the NHL, Martin has been described as both an enforcer and a grinder.

Jon Cor is a Canadian actor, best known for playing Hodge Starkweather on Shadowhunters: The Mortal Instruments and Brick on Total Drama.

Michael Anthony Claudio Wincott is a Canadian character actor known for his deep, raspy voice and for being cast in villainous roles.