The King's Plate (known as the Queen's Plate from 1860 to 1901 and 1952 to 2022) is Canada's oldest thoroughbred horse race and the oldest continuously run race in North America, having been founded in 1860. It is run at a distance of 1+1⁄4 miles (2 kilometres) for a maximum of 17 three-year-old thoroughbred horses foaled in Canada.
The race is the first in the Canadian Triple Crown, typically taking place each summer at Woodbine Racetrack in Etobicoke, Ontario. The event was scheduled in June or July until 2020, when it was postponed to September, due to government-imposed restrictions in place through the COVID-19 pandemic.