The Cree are a North American Indigenous people. They live primarily in Canada, where they form one of the country’s largest First Nations. The major proportion of Cree in Canada live north and west of Lake Superior, in Ontario, Manitoba, Saskatchewan, Alberta, the Northwest Territories, and Quebec.

In the United States, Cree people historically lived from Lake Superior westward. Today, they live mostly in Montana, where they share the Rocky Boy Indian Reservation with Ojibwe (Chippewa) people. The documented westward migration over time has been strongly associated with their roles as traders and hunters in the North American fur trade.

Resource: https://en.wikipedia.org/wiki/Cree