The Ontario Debutante Stakes is a Canadian Thoroughbred horse race run annually in mid-August at Woodbine Racetrack in Toronto, Ontario. Open to Two-year-old Fillies, it is contested over Six furlongs on Polytrac synthetic dirt.

From 1989 through 1993 and from 1995 through 1997, the Ontario Debutante Stakes was hosted by Fort Erie Racetrack in Fort Erie, Ontario. The race was run in two divisions in 1979.

Speed record: (Through 1998, Woodbine times were recorded in fifths of a second. Since 1999 they are in hundredths of a second)

• 1:09.75 - Knights Templar (2005)

Most wins by an owner:

• 3 - Kinghaven Farms (1982, 1983, 2000)

Most wins by a jockey:

• 5 - David Clark (1979, 1980, 1987, 1989, 2006)

Most wins by a trainer:

• 3 - Roger Attfield (1995, 2000, 2004)

• The Ontario Debutante Stakes at Pedigree Query
• The Ontario Debutante Stakes at Woodbine Racetrack