Archworth (foaled 1936) was a Thoroughbred racehorse owned by The Globe and Mail publisher George McCullagh that won the 1939 King's Plate, Prince of Wales Plate, and Breeders' Stakes, races that were later designated as the Canadian Triple Crown.

Archworth's dam Archipelego was by Samoa, who was imported from Britain and became a moderately successful sire.

[2] At age three, Archworth raced 16 times with five wins and three second-place finishes[1] and was named the Canadian champion three-year-old of 1939.

Queen Elizabeth Bowes-Lyon was impressed by the colt's front-running style, saying "Never have I seen a horse go out and take such a long lead and hold it."

McCullagh gave credit to the colt's breeder, William Wright, saying: "It's a great day for me, but I am only the stuffed shirt who bought him for $500.

His most successful offspring was Victory Arch, who won 14 races from 38 starts, including the Prince of Wales Plate.