List of Famous people born in Ontario, Canada

Florence Lawrence was a Canadian-American stage performer and film actress. She is often referred to as the "first movie star", and was thought to be the first film actor to be named publicly until evidence published in 2019 indicated that the first named film star was French actor Max Linder. At the height of her fame in the 1910s, she was known as the "Biograph Girl" for work as one of the leading ladies in silent films from the Biograph Company. She appeared in almost 300 films for various motion picture companies throughout her career.

Lucas Daniel Cavallini is a Canadian soccer player who currently plays for Vancouver Whitecaps FC in MLS, and the Canada national team.

Yvette Kong is a Hong Kong competitive Olympic swimmer.

Alejandro Tabilo is a Chilean tennis player.

Louis Nirenberg was a Canadian-American mathematician, considered one of the most outstanding mathematicians of the 20th century.

James Paul Byron is a Canadian professional ice hockey forward and alternate captain for the Montreal Canadiens of the National Hockey League (NHL). Byron was drafted by the Buffalo Sabres in the sixth round, 179th overall, of the 2007 NHL Entry Draft and made his NHL debut with Buffalo in 2011 before a trade sent him to the Calgary Flames.

James Jeffrey "Jeff" Plewman, better known by his stage name Nash the Slash, was a Canadian musician. A multi-instrumentalist, he was known primarily for playing the electric violin and mandolin, as well as the harmonica, keyboards, glockenspiel, and other instruments.

Anne Carson is a Canadian poet, essayist, translator, classicist, and professor.

Glenn John McQueen was a Canadian supervisor of digital animation and supervising character animator at Pixar and PDI.

William John ("Billy") Cameron (1878-1955) was a newspaper editor most well known for his work at The Dearborn Independent, where he was responsible for publishing a series of anti-Semitic articles known as "The International Jew". He also was influential in the British Israel movement, helping Howard Rand launch the Anglo-Saxon Federation of America.