Lake Erie is in Ontario.
Lake Erie ( [ ˈɪəri ] Lac Érié ) is the fourth-largest lake ( by surface area ) of the five Great Lakes in North America , and the thirteenth-largest globally if measured in terms of surface area . Ontario . These are the Rainy River , the Pigeon River , Lake Superior , the St. Marys River , Lake Huron , the St. Clair River , Lake St. Clair , the Detroit River , Lake Erie , the Niagara River , Lake Ontario and along the St. Lawrence River from Kingston , Ontario , to the Quebec boundary just east of Cornwall , Ontario .