List of Famous people born in Ontario, Canada

Steve Rolls is a Canadian middleweight professional boxer from Chatham, Ontario. He currently resides in Etobicoke, Ontario, and trains with Ryan Grant at Grant's MMA & Tommy Howat at Olympia Muscle & Fitness.

Bryan Bickell is a Canadian former professional ice hockey player who played for the Chicago Blackhawks and the Carolina Hurricanes of the National Hockey League (NHL). He won the Stanley Cup with the Chicago Blackhawks in 2013 and 2015, and played in four early playoff games during the team's run to the 2010 Stanley Cup championship. Bickell spent nearly 10 years with the Blackhawks organization before being traded to the Hurricanes before the 2016–17 season. He was diagnosed with multiple sclerosis later that year and retired from playing hockey at the end of the season.

Andrea Joy Cook, known professionally as A. J. Cook, is a Canadian actress. She is best known for her role as Supervisory Special Agent Jennifer "JJ" Jareau on the CBS crime drama Criminal Minds (2005-2020). Cook has also appeared in The Virgin Suicides (1999), Higher Ground (2000), Ripper (2001), Out Cold (2001), Final Destination 2 (2003), and Tru Calling (2003–2004).

Chris Austin Hadfield is a retired CSA astronaut, engineer, and former Royal Canadian Air Force fighter pilot. The first Canadian to walk in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station.

Patricia Lynn Mallette is a Canadian author, film producer, and mother of Justin Bieber. She also managed her son's early career. Her autobiography, Nowhere but Up, was published in 2012 by Christian book publisher Revell, and was #17 on the New York Times Best Seller list during its first week of release.

Christina Pazsitzky, known by her stage name Christina P, is a Canadian-American stand-up comedian, podcaster, writer, host and TV personality. Pazsitzky co-hosts Your Mom's House and “Where My Mom’s At” podcasts. She lives with her family in Los Angeles, California.

Andreas Athanasiou is a Canadian professional ice hockey forward for the Los Angeles Kings of the National Hockey League (NHL). Athanasiou was drafted 110th overall by the Detroit Red Wings in the 2012 NHL Entry Draft.

Wayne Simmonds is a Canadian professional ice hockey player for the Toronto Maple Leafs of the National Hockey League (NHL). Simmonds has previously played for the Los Angeles Kings, Philadelphia Flyers, Nashville Predators, New Jersey Devils and Buffalo Sabres. He is known to his teammates and fans by the nickname "Wayne Train".

Paul Desmarais Sr. was a Canadian financier and philanthropist, based in Montreal. With an estimated family net worth of US$4.5 billion, Desmarais was ranked by Forbes as the fourth wealthiest person in Canada and 235th in the world in 2013. He was chairman and chief executive officer of Power Corporation of Canada until 1996 when he passed the reins of management of Power Corporation to his sons, Paul Jr. and André. He then continued to serve as a director and as chairman of the executive committee of the board, and remained the controlling shareholder. Power Corporation of Canada is a diversified international management and holding company with interests in companies in the financial services, asset management, sustainable and renewable energy, and other business sectors.

Darwyn Cooke was a Canadian comics artist, writer, cartoonist, and animator who worked on the comic books Catwoman, DC: The New Frontier, The Spirit and Richard Stark's Parker: The Hunter. His work has been honoured with numerous Eisner, Harvey, and Joe Shuster Awards.