The 13,057-square-miles of South Dakota land held by these five tribal nations equates to 16.93% of South Dakota’s total area. On the interactive map below, South Dakota’s nine reservations ...

This Sept. 9, 2012 file photo shows The entrance to the Pine Ridge Indian Reservation in South Dakota, home to the Oglala Lakota Nation viewed on Sept. 9, 2012.

The 13,057-square-miles of South Dakota land held by these five tribal nations equates to 16.93% of South Dakota’s total area. On the interactive map below, South Dakota’s nine reservations ...