The London Knights are a junior ice hockey team from London, Ontario, Canada, playing in the Ontario Hockey League, one of the leagues of the Canadian Hockey League. The Knights started out in 1965 as the London Nationals but changed to their current name in 1968. The Knights have won two Memorial Cup championships.

The Ontario Hockey League is one of the three major junior ice hockey leagues which constitute the Canadian Hockey League. The league is for players aged 16–20. There are currently 20 teams in the OHL: seventeen in Ontario, two in Michigan, and one in Pennsylvania.