List of Famous people born in Ontario, Canada

Wilford Hamilton Fawcett, also known as Captain Billy, was an American magazine publisher and sports shooter. He competed in the trap event at the 1924 Summer Olympics.

Ned Sparks was a Canadian-born character actor of the American stage and screen. Sparks was known for his deadpan expression and deep, gravelly voice.

Armand Schaefer was a Canadian film producer and director. He produced over 100 films between 1932 and 1953. He also directed 24 films between 1931 and 1946. He was born in Tavistock, Ontario, Canada. From 1955 to 1956, he joined Gene Autry as co-executive producers of the Dickie Jones western television series Buffalo Bill, Jr.

Sidney Olcott was a Canadian-born film producer, director, actor and screenwriter.

Elmer Clifton was an American writer, director and actor from the early silent days. A collaborator of D.W. Griffith, he appeared in The Birth of a Nation (1915) and Intolerance (1916) before giving up acting in 1917 to concentrate on work behind the camera, with Griffith and Joseph Henabery as his mentors. His first feature-length solo effort as a director was The Flame of Youth with Jack Mulhall.

Henry Russell Walter, known professionally as Cirkut, is a Canadian record producer and songwriter. He has co-produced and co-written for Dr. Luke, Katy Perry, Becky G, Ava Max, Nicki Minaj, R. City, The Weeknd, Kesha, Ciara, Pitbull, Britney Spears, Ne-Yo, Rihanna, Adam Lambert, B.o.B, Marina and the Diamonds, will.i.am, G.R.L. and Juicy J, among others. Songs he has written and produced include the Billboard Hot 100 No. 1 singles "Part of Me", "Roar" and "Dark Horse" by Katy Perry, and "Wrecking Ball" by Miley Cyrus. His production credits on The Weeknd's album Starboy won him the 2018 Grammy Award for Best Urban Contemporary Album. His most recent collaboration was on Jungkook's single, "Seven" (2023).

Delmar "Del" Lord was a Canadian film director and actor best known as a director of Three Stooges films.

Sir George William Ross was an educator and politician in the Canadian province of Ontario. He was the fifth Premier of Ontario from 1899 to 1905.

Henry Alexander MacRae was a Canadian film director, producer, and screenwriter during the silent era, working on many film serials for Universal Studios. One of a number of Canadian pioneers in early Hollywood, MacRae was credited with many innovations in film production, including artificial light for interiors, the wind machine, double exposures and shooting at night.

Gordon Thomson is a Canadian actor widely known for his role as Adam Carrington on the 1980s American prime time soap opera Dynasty.