Most of the Yankton live on the Yankton Indian Reservation in southeastern South Dakota. Some Yankton live on the Lower Brule Indian Reservation and Crow Creek Reservation, which is also occupied by the Lower Yanktonai. The Upper Yanktonai live in the northern part of Standing Rock Reservation, on the Spirit Lake Reservation in central North Dakota. Others live in the eastern half of the Fort Peck Indian Reservation in northeastern Montana. In addition, they reside at several Canadian reserves, including Birdtail, Oak Lake, and Whitecap (formerly Moose Woods).