King's Highway 11, commonly referred to as Highway 11, is a provincially maintained highway in the Canadian province of Ontario. At , it is the second longest highway in the province, following Highway 17. Highway 11 begins at Highway 400 in Barrie, and arches through northern Ontario to the Ontario–Minnesota border at Rainy River via Thunder Bay; the road continues as Minnesota State Highway 72 across the Baudette-Rainy River International Bridge.